Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.

wrote:
Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.

Hi,
You should hang a meter on the HSI connector to read 120V AC before
replacing it.(I keep a spare HSI all the time)
What is error code? If HSI does not glow it is not getting the 120V it
needs on time. Control board may have a cold solder joint due to heat.
Or relay which switches HSI power is not working. In this case it could
be relay itself or logic signal controlling it.
I have a same family furnace here and went thru logic board once so I am
quite familiar with it.
Again, what is error code?
One thing I can suggest you off my head is flip the board over and look
carefully under the two high Wattage resistors to see if the solder
joints is cracked due to heat. I mean hair line crack. Wiggle the
resistors to confirm it. If indeed tha's case, resolder the joint and
drill couple holds around the resistor on the plastic cover for good
cooling. BTW, manual has trouble-shooting flow chart.
Good luck,

Ok, I've been doing some research, and see the next thing to test is
the pressure switch. I've seen some sites that say it should read 24v
across the terminals when the correct negative pressure it reached. Can
I get a clue where the switch is located?

In article . com,
" wrote:

Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.

Not really. There are many variables to the sequence of operation of
your furnace, that you need to check.

You can keep on changing parts, until you find out what it is that is
causing the problem, and even after you have replaced everything in the
furnace, you might still have the same problem.

I would call a pro, since furnace repair is really not a DIY repair.

wrote in message
ups.com...
Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.


Maybe the problem wasn't a bad HSI.

wrote:
Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.


If it was a newer furnace (don't know about 1987 features) I'd first
check that the air filter (cold air return) isn't clogged, check that
if high efficency the outside air intake/exhaust aren't blocked. And
you might try moving the ignitor a tad closer to the flame ... worked
for me with an older gas furnace.

On 2 Aug 2006 23:49:01 -0700, "
wrote:

Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.

Just keep throwing parts at it and listening to bogus advice from
newsgroups and you'll eventually fix it.

wrote:
Ok, I've been doing some research, and see the next thing to test is
the pressure switch. I've seen some sites that say it should read 24v
across the terminals when the correct negative pressure it reached. Can
I get a clue where the switch is located?

Hmmm,
If you don't know what/where pressure switch is, hmmm, it's near the
inducer motor. See that little clear hose? What is error code?

Tony Hwang wrote in news:n9nAg.309509$Mn5.127815
@pd7tw3no:

wrote:
Ok, I've been doing some research, and see the next thing to test is
the pressure switch. I've seen some sites that say it should read 24v
across the terminals when the correct negative pressure it reached. Can
I get a clue where the switch is located?

Hmmm,
If you don't know what/where pressure switch is, hmmm, it's near the
inducer motor. See that little clear hose? What is error code?



ROTFLMAO!!
OK, fess up..this is a test script for a new sitcom, right???
It's going to be a big hit, because it's hilarious!

--
Respectfully, Bob

wrote in message
ups.com...
Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.


Before you call in a pro, you might want to do some homework..... Consider
that they only build them to last 18 - 20 years. Second, in just a little
over 3 years, the R-22 equipment will not be available anymore.
http://www.epa.gov/ozone/title6/phaseout/hcfc.html
Instead of screwing with your Jurrasic furnace, you should be looking at a
whole new energy efficient system. Sorry, no, its not gonna be free....but
the new system will most likely pay for itself in energy savings in just a
few short years.

Bob_Loblaw wrote:
Tony Hwang wrote in news:n9nAg.309509$Mn5.127815
@pd7tw3no:


wrote:

Ok, I've been doing some research, and see the next thing to test is
the pressure switch. I've seen some sites that say it should read 24v
across the terminals when the correct negative pressure it reached. Can
I get a clue where the switch is located?


Hmmm,
If you don't know what/where pressure switch is, hmmm, it's near the
inducer motor. See that little clear hose? What is error code?




ROTFLMAO!!
OK, fess up..this is a test script for a new sitcom, right???
It's going to be a big hit, because it's hilarious!

Hi,
Basic IQ test, LOL!

You can get a clue, or for five hundred dollars, I'll give you what's
behind curtain number one!

--

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

wrote in message
ups.com...
Ok, I've been doing some research, and see the next thing to test is
the pressure switch. I've seen some sites that say it should read 24v
across the terminals when the correct negative pressure it reached.
Can
I get a clue where the switch is located?

wrote:
Back in the spring, my 1987 Carrier Vertical GFA system wouldn't fire
up. I saw that after the HSI didn't come on, it went into shutdown
mode. I figured I'd replace the HSI before fall.

Now, $30 later, the new HSI still won't fire up. The draft induction
motor starts, but no HSI. Could this problem be in the control module?
Is there any suggestion for giving it another DYI repair before I call
in a pro? Any links? Thanks.
make sure your vent pipe is clogged with something if not then your gas
valve maybe sticking