Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.
any ideas, TIA

John H wrote:
Say the thermostat says its 82 in your house, I set my AC at 78. It
will go on immediately like its supposed to, but then after a couple
minutes it goes off and its not even close to 78? Just goes on and
off. Stays on for maybe 5 minutes. I know its costing me more for
power just becuase to starting up more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a
few years back from the original, those old round ones. I dont
remember this happening after I replaced it.
any ideas, TIA

There are several possibilities including a vent near the thermostat
triggering it early to a mechanical/pressure problem with the A/C unit.

I don't know, but maybe your new thermostat has some sort of anticipator
for the A/C (anyone know if someone is doing that now?

--
Joseph Meehan

Dia 's Muire duit

On Fri, 27 Apr 2007 17:32:31 -0700, "John H" wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.

If you saved the old thermostat, you could put it back in place. I am
not saying that so likely to fix it, but I don't know much about AC.

BTW, I saved my thermostat and I'm going to use it to notify the alarm
monitoring company if the temp goes too cold in the winter.

any ideas, TIA

Joseph Meehan wrote:

There are several possibilities including a vent near the thermostat
triggering it early to a mechanical/pressure problem with the A/C unit.

I don't know, but maybe your new thermostat has some sort of anticipator
for the A/C (anyone know if someone is doing that now?

Thermal cutout on the compressor? Would that tripping remove the
control voltage to the thermostat?

On 27 Apr 2007 19:43:06 -0700, KC wrote:


Joseph Meehan wrote:

There are several possibilities including a vent near the thermostat
triggering it early to a mechanical/pressure problem with the A/C unit.

I don't know, but maybe your new thermostat has some sort of anticipator
for the A/C (anyone know if someone is doing that now?

Thermal cutout on the compressor? Would that tripping remove the
control voltage to the thermostat?


That could be it, The anticipator is a good thing to look at. If you
have one that is.

On Fri, 27 Apr 2007 23:16:52 -0400, Meat Plow
wrote:

On Fri, 27 Apr 2007 17:32:31 -0700, John H wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.
any ideas, TIA

Maybe the condensing unit is low on refrigerant or the A coil in the
plenum is dirty or the filter is dirty or combination. You need a tech
with a set of gauges to check high and low side pressures and give you a
diagnosis.

That would be me, I'm EPA certified and hace the gauges.

On Fri, 27 Apr 2007 17:32:31 -0700, "John H" wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.
any ideas, TIA

I'me not a pro but I've tinkered a fair amount ...

There are switch(s) in the condensing unit that prevent the
compressor from running very long under unsuitable conditions,
i.e. refrigerant pressure is too lo or too hi.

IIRC, under such conditions, the lite on the tstat stays on.
Does yours?

If not, the tstat or the lo-voltage circuitry could be the
problem.

You very likely need a conny-tractor either way.

P

"Mit der Dummheit kaempfen Goetter selbst vergebens!"
-Friedrich Schiller

On Fri, 27 Apr 2007 23:41:11 -0400, Meat Plow
wrote:

On Sat, 28 Apr 2007 03:03:56 +0000, Lamey wrote:

On 27 Apr 2007 19:43:06 -0700, KC wrote:


Joseph Meehan wrote:

There are several possibilities including a vent near the thermostat
triggering it early to a mechanical/pressure problem with the A/C unit.

I don't know, but maybe your new thermostat has some sort of anticipator
for the A/C (anyone know if someone is doing that now?

Thermal cutout on the compressor? Would that tripping remove the
control voltage to the thermostat?


That could be it, The anticipator is a good thing to look at. If you
have one that is.

High and low side gauges and an Amprobe on the CU main. An experienced
tech does this right away for one, to prevent permanent damage to the CU
and to determine whether it's a compressor issue or call for
cooling/anticipater/differential problem.

I wuz a tech skool trained heat/cool tech/installer back in the late 70's

Right on! We're walking the same path a little here. We must talk
sometime.

On Fri, 27 Apr 2007 23:57:59 -0400, Meat Plow
wrote:

On Sat, 28 Apr 2007 03:37:42 +0000, Lamey wrote:

On Fri, 27 Apr 2007 23:16:52 -0400, Meat Plow
wrote:

On Fri, 27 Apr 2007 17:32:31 -0700, John H wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.
any ideas, TIA

Maybe the condensing unit is low on refrigerant or the A coil in the
plenum is dirty or the filter is dirty or combination. You need a tech
with a set of gauges to check high and low side pressures and give you a
diagnosis.

That would be me, I'm EPA certified and hace the gauges.

Do you hace a set of steel R-117 gauges like I do?
Nope, old ones, It's been awhile. I worked on restaurant equipment for
a while. The HVAC biz up here in taken. So I build log homes now.
sigh

Could be any of a bunch of things. We need a lot more information
than what you just provided. I may be able to help, if you can
get me some more information. Interested?

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
..

"John H" wrote in message
...
: Say the thermostat says its 82 in your house, I set my AC at
78. It will go
: on immediately like its supposed to, but then after a couple
minutes it goes
: off and its not even close to 78? Just goes on and off. Stays
on for maybe 5
: minutes. I know its costing me more for power just becuase to
starting up
: more than it should...
: The thermostat is a digital one called Ritetemp... I replaced
it a few years
: back from the original, those old round ones. I dont remember
this happening
: after I replaced it.
: any ideas, TIA
:
:

On Fri, 27 Apr 2007 17:32:31 -0700, "John H" wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will go
on immediately like its supposed to, but then after a couple minutes it goes
off and its not even close to 78? Just goes on and off. Stays on for maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few years
back from the original, those old round ones. I dont remember this happening
after I replaced it.
any ideas, TIA


It is probably over charged or under charged.

If it has a low pressure shut off switch, the compressor creates a
suction that falls below the shutoff point, but then builds back up
after awile and starts again after a delay timer expires.

While that would cause the compressor to cycle on and off, the blower fan
should continue to run and the OP is making it sound like the entire unit is
turning on and off. I would look at either the thermostat or the wiring
from the thermostat to the unit for loose connections as a starting point.

--
If at first you don't succeed, you're not cut out for skydiving

"Deke" wrote in message
news
On Fri, 27 Apr 2007 17:32:31 -0700, "John H" wrote:

Say the thermostat says its 82 in your house, I set my AC at 78. It will
go
on immediately like its supposed to, but then after a couple minutes it
goes
off and its not even close to 78? Just goes on and off. Stays on for
maybe 5
minutes. I know its costing me more for power just becuase to starting up
more than it should...
The thermostat is a digital one called Ritetemp... I replaced it a few
years
back from the original, those old round ones. I dont remember this
happening
after I replaced it.
any ideas, TIA


It is probably over charged or under charged.

If it has a low pressure shut off switch, the compressor creates a
suction that falls below the shutoff point, but then builds back up
after awile and starts again after a delay timer expires.