Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.



On Fri, 15 Jul 2005 23:51:04 -0500, wrote:

We have been having a heat wave, with temps up near 100 degrees for
well over a week. Today it got so hot in my house that the furnace
blower kicked on. I thought that was rather odd, since I do not have
central AC. Then it hit me. It was so friggin hot that the furnace
sensor (probably a klixon) thought the burner was on, and the blower
kicked in. I shut off the power to the furnace, but that tells me
it's time to set up my tent, since it's just too frikkin hot to stay
in the house, especially since Sunday is supposed to hit some sort of
heat record.

Mark

rj

"RJ" wrote in message
...
Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.


If its an older model, with a bi-metal adjustable fan limit switch, its
either set too low, or out of calibration..
the overload is normally set at 250F..so..guess what?




On Fri, 15 Jul 2005 23:51:04 -0500, wrote:

We have been having a heat wave, with temps up near 100 degrees for
well over a week. Today it got so hot in my house that the furnace
blower kicked on. I thought that was rather odd, since I do not have
central AC. Then it hit me. It was so friggin hot that the furnace
sensor (probably a klixon) thought the burner was on, and the blower
kicked in. I shut off the power to the furnace, but that tells me
it's time to set up my tent, since it's just too frikkin hot to stay
in the house, especially since Sunday is supposed to hit some sort of
heat record.

Mark

rj

wrote:
We have been having a heat wave, with temps up near 100 degrees for
well over a week. Today it got so hot in my house that the furnace
blower kicked on. I thought that was rather odd, since I do not have
central AC. Then it hit me. It was so friggin hot that the furnace
sensor (probably a klixon) thought the burner was on, and the blower
kicked in. I shut off the power to the furnace, but that tells me
it's time to set up my tent, since it's just too frikkin hot to stay
in the house, especially since Sunday is supposed to hit some sort of
heat record.

Mark

Why shut it off? It is a great aid to cooling the house even without
A/C. Mine goes to ON as soon as the house begins to warm up (about
noon) and stays on until bedtime (midnight). A/C kicks on much later
that way. The fan itself is only a fractional horse motor so the cost
is minimal, much less than running the A/C.

Harry K

If that furnace is in the attic it is possible for the temperature to
get high enough occasionally for a bi-metal fan switch to to close even
if it is properly adjusted. I have also seen it happen on mobile homes
with the fixed disc fan switches. Solution-- run the A/C. Larry

I had that happen in my last trailer. Had those narrow slat windows, and I
didn't have an AC.

Yep, those Klingons do get hot.

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com


wrote in message
...
We have been having a heat wave, with temps up near 100 degrees for
well over a week. Today it got so hot in my house that the furnace
blower kicked on. I thought that was rather odd, since I do not have
central AC. Then it hit me. It was so friggin hot that the furnace
sensor (probably a klixon) thought the burner was on, and the blower
kicked in. I shut off the power to the furnace, but that tells me
it's time to set up my tent, since it's just too frikkin hot to stay
in the house, especially since Sunday is supposed to hit some sort of
heat record.

Mark

Just leave it on. Won't hurt anything.

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.com


"RJ" wrote in message
...
Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.

"Stormin Mormon" wrote in message
...
I had that happen in my last trailer. Had those narrow slat windows, and I
didn't have an AC.

Yep, those Klingons do get hot.


Klingons? Aren't those the things that hang on before you wipe your bottom?

And you wonder why most people think you're a hack....

Stormin Mormon wrote:
Just leave it on. Won't hurt anything.


snip

Right. It is a great way to help keep the house cool. The fan is on a
fractional horse motor, costs pennies to run and will keep the A/C from
kicking on for another hour or two.

I posted that this morning (and two others) but haven't seen any of
them.

Harry K

Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on a
fractional horse motor, costs pennies to run and will keep the A/C from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K

RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on a
fractional horse motor, costs pennies to run and will keep the A/C from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

Harry K

wrote:
"RJ" wrote in message
...
Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.


If its an older model, with a bi-metal adjustable fan limit switch, its
either set too low, or out of calibration..
the overload is normally set at 250F..so..guess what?



Well its not just the overheat setting

My furnace blower continues to run after the fire shuts off as the heat
exchanger cools down and it continues to run untill the air is at about
100 F. Due to hystereisis it takes a higher temp to get it to turn
on, but onece on, it won't turn off untill the air drops below 100F.

His blower control may be a bit out of adjustment but not anything
serious.

Mark

"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


Harry K

"Mark" wrote in message
ups.com...


wrote:
"RJ" wrote in message
...
Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.


If its an older model, with a bi-metal adjustable fan limit switch, its
either set too low, or out of calibration..
the overload is normally set at 250F..so..guess what?



Well its not just the overheat setting

No one said it was.


My furnace blower continues to run after the fire shuts off as the heat
exchanger cools down and it continues to run untill the air is at about
100 F. Due to hystereisis it takes a higher temp to get it to turn
on, but onece on, it won't turn off untill the air drops below 100F.



His blower control may be a bit out of adjustment but not anything
serious.

Belive thats what we said..

Mark

Harry K wrote:


RP wrote:

Harry K wrote:


Stormin Mormon wrote:


Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on a
fractional horse motor, costs pennies to run and will keep the A/C from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K



Try it and see. It works by having the air in the room moving.

So it's the higher setpoint that keeps it from kicking on rather than
the moving air?

hvacrmedic

You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

Harry K

" wrote in
message ...

"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


This is Turtle.

WOW Your fixing to tell me something here why drawing air from a basement is
against every building code there is. what if the draw air supply / furnacers
are in the basement ?

TURTLE

"TURTLE" wrote in message
...

" wrote in
message ...

"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is
on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


This is Turtle.

WOW Your fixing to tell me something here why drawing air from a basement
is
against every building code there is. what if the draw air supply /
furnacers
are in the basement ?

TURTLE


Do you have a copy of the IBC?
If you do, read it retard. You cant just arbitraly start drawing air from a
basement.

" wrote in
message ...

"TURTLE" wrote in message
...

" wrote in
message ...

"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is
on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


This is Turtle.

WOW Your fixing to tell me something here why drawing air from a basement
is
against every building code there is. what if the draw air supply /
furnacers
are in the basement ?

TURTLE


Do you have a copy of the IBC?
If you do, read it retard. You cant just arbitraly start drawing air from a
basement.


This is Turtle.

That is not a answer at all. If that was true. You could get the same answer
from having a dictionary also.

TURTLE

Harry,

He can't set his AC temperature setting higher. He doesn't have AC and
it is over 100 degrees in his house. I recommend he buys a window unit
while some are still available and put it in his bedroom and spend all
his time in the house there. And leave the power off to his furnace.
100 degree wind will not feel cool.

Stretch

Steve,
I habe a copy of the international building code and the International
residential mechanical code. I could not find where it said you cannot
have a return in the basement, unless the basement was so small that it
would remove the combustion air from the room and backdraft the flue.
Perhaps you could quote chapter and verse?

However, it still would not cool the house in that situation, unless
you have a VERY COLD basement.

Stretch

Stretch wrote:

snip

However, it still would not cool the house in that situation, unless
you have a VERY COLD basement.

Stretch

How so? My basement is cool enough that there is a noticeable drop in
temp as I go down there. The air is very definitely much cooler than
the living area and for sure cooler than the A/C cut-in temp. It is not
VERY COLD tho. Any air cooler than the cut-in temp is an aid. Granted
that air doesn't last all that long.

Harry K

wrote:
"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


Harry K


That's one of those claims that I want a cite before I believe it. And
keep in mind: you made the claim, you provide the cite. In this case,
an excerpt as I do not have the IBC or at least a URL to it.

Harry K

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sat, 16 Jul 2005 08:06:30 -0400, "
wrote:

"RJ" wrote in message
.. .
Good to hear it's happened to you too.
I've been watching a friends house while he's away.

The thermostat has HEAT OFF COOL setttings,
and it was set to OFF

THe inside of the house was close to 100 degrees,
and the furnace blower motor was running.

The only way I could get it to stop was to
flip the circuit breaker !

I was getting ready to call a HVAC guy until I read your post.


If its an older model, with a bi-metal adjustable fan limit switch,
its either set too low, or out of calibration..
the overload is normally set at 250F..so..guess what?

Guess what? In our school bungalos (sans a/c), the unit's fan
controls would kick in at 110. And it got hot enough in the summer,
in the LA suburbs...

....nothing to do with the high limit


-----BEGIN PGP SIGNATURE-----
Version: PGP 7.1

iQA/AwUBQtxhvAIk7T39FC4ZEQKAvQCg7IrMb8aYBoD7ufZUVBSrwH wu8zoAniQ2
K4oHOGzaQF85DHCQ0qbOG1pK
=nu7T
-----END PGP SIGNATURE-----

--
-john
wide-open at throttle dot info

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sat, 16 Jul 2005 17:57:31 -0400, "HeatMan"
wrote:


"Stormin Mormon" wrote in
message ...
I had that happen in my last trailer. Had those narrow slat
windows, and I didn't have an AC.

Yep, those Klingons do get hot.


Klingons? Aren't those the things that hang on before you wipe your
bottom?

And you wonder why most people think you're a hack....




He was being facetious. I prefer Borg-Warner, myself. But I've got
a one Trek mind. What a Warped sense of humor we have...


-----BEGIN PGP SIGNATURE-----
Version: PGP 7.1

iQA/AwUBQtxjfAIk7T39FC4ZEQJAJgCfSzyEuytnz5kQH/OUEPD9xOEHliYAnjHW
rWuNQQzBCRrN6KorGIaPHX9z
=ohRd
-----END PGP SIGNATURE-----

--
-john
wide-open at throttle dot info

"Harry K" wrote in message
oups.com...


wrote:
"Harry K" wrote in message
oups.com...


RP wrote:
Harry K wrote:


Stormin Mormon wrote:

Just leave it on. Won't hurt anything.



snip

Right. It is a great way to help keep the house cool. The fan is on
a
fractional horse motor, costs pennies to run and will keep the A/C
from
kicking on for another hour or two.

My version of physics seems to conflict with that notion.

hvacrmedic


I posted that this morning (and two others) but haven't seen any of
them.

Harry K


Try it and see. It works by having the air in the room moving. You
feel more comfortable at the same temperature and can set the A/C
higher. Mine goes on about noon every day in summer and stays on until
bedtime. If you have a basement and have a way of sucking your feed
air from there, you gain even more.

And its against all known building codes for a reason.


Harry K


That's one of those claims that I want a cite before I believe it. And
keep in mind: you made the claim, you provide the cite. In this case,
an excerpt as I do not have the IBC or at least a URL to it.

Harry K


This is Turtle.

Awww Steve was tring to bull**** you will some dazzeling words and well just
forget it as being true or not.

TURTLE

"Stretch" wrote in message
ups.com...
Steve,
I habe a copy of the international building code and the International
residential mechanical code. I could not find where it said you cannot
have a return in the basement, unless the basement was so small that it
would remove the combustion air from the room and backdraft the flue.
Perhaps you could quote chapter and verse?

However, it still would not cool the house in that situation, unless
you have a VERY COLD basement.

Stretch


This is Turtle.

awwww , Don't worry about it for Steve was tring to Dazzle a Turtle from the
Backwood with some big fancy 50 cent words and book referrances. He was just
bull**** everybody.

TURTLE

In alt.home.repair on 17 Jul 2005 07:35:36 -0700 "Mark"
posted:


If its an older model, with a bi-metal adjustable fan limit switch, its
either set too low, or out of calibration..
the overload is normally set at 250F..so..guess what?



Well its not just the overheat setting

My furnace blower continues to run after the fire shuts off as the heat
exchanger cools down and it continues to run untill the air is at about
100 F. Due to hystereisis it takes a higher temp to get it to turn
on, but onece on, it won't turn off untill the air drops below 100F.

Is this really hysteresis or just a thermostat that is designed to
turn off at a lower temperature than it turns on at?

His blower control may be a bit out of adjustment but not anything
serious.

Mark


Meirman
--
If emailing, please let me know whether
or not you are posting the same letter.
Change domain to erols.com, if necessary.

Is this really hysteresis or just a thermostat that is designed to
turn off at a lower temperature than it turns on at?
Meirman

n. pl. hys·ter·e·ses [ -sz ]

The lagging of an effect behind its cause, as when the change in magnetism
of a body lags behind changes in the magnetic field.

Not *hysteresis* according to Webster. But language is an evolving art and
Webster is sometimes slow in catching up with technical jargon. I have used
and heard *hysteresis* used in the same sense as by the previous poster and
it has always been understood.

SJF