Home and Auto Furnace Question. - Page 4

**Saulbadguy** · 12-31-2008, 09:29 PM

My furnace stopped working. When I turn on the heat, it runs for a few minutes and then shuts off. It won't kick on the fan automatically, so no air is blown at all. When I put the fan on "ON" it just blows cool air.

After it runs for a few minutes I have to flip the on/off switch on the furnace to get it to run again, but then it just shuts off again.

I did install a new furnace filter a few days ago, but I suspect that has nothing to do with this.

Thoughts?

**mikeyis4dcats.** · 01-01-2009, 11:15 AM

also, try removing the filter. Sometimes the wrong filter type will restrict airflow too much and the furnace will shut down.

rad · 01-01-2009, 11:20 AM

Sounds like you need to bleed it, if it's oil.

Break loose the bleeder (usually a 7/16 wrench) and put a tuna can under it. Press the reset and let it startup. Once you get a steady stream of fuel out of the bleeder, close the bleeder. Furnace should fire right up.
I had to do this alot before I got my new furnace.

**Saulbadguy** · 01-01-2009, 11:27 AM

Quote:

Originally Posted by rad

Sounds like you need to bleed it, if it's oil.

Break loose the bleeder (usually a 7/16 wrench) and put a tuna can under it. Press the reset and let it startup. Once you get a steady stream of fuel out of the bleeder, close the bleeder. Furnace should fire right up.
I had to do this alot before I got my new furnace.

I live in Kansas. Natural gas FTW.

StcChief · 01-01-2009, 11:32 AM

Quote:

Originally Posted by Saulbadguy

I live in Kansas. Natural gas FTW.

\
ok was it a sensor at hot surface or ?

NCarlsCorner2 · 01-01-2009, 11:34 AM

Quote:

Originally Posted by Saulbadguy

I live in Kansas. Natural gas FTW.

If you want heat, take a lighter and when you hear that hissing noise put the flame down there by the burner where the hot surface ignitor is located, once the gas hits the flame the burners will lite and heat up until the fan comes on, then you will know that it is the hot surface ignitor that is bad for sure, if the pressure switch was not closing due to a bird the gas valve would never be energized at all, so that would also rule out the pressure switch, if you turn on the fan at the thermostat and the fan comes on, you can rule out a tripped breaker, just from the syptoms that you have described I think your problem is a hot surface ignitor or the ignition module.

**Saulbadguy** · 01-01-2009, 11:48 AM

Quote:

Originally Posted by StcChief

\
ok was it a sensor at hot surface or ?

Hell if I know. I've given up trying to **** with the thing and will call a service technician tomorrow.

tmax63 · 01-01-2009, 11:48 AM

My furnace has a fan that kicks on before ignition to purge the combustion chamber of any gas/fumes that may have collected prior to kicking on the ignitor and gas. It has a sensor that is triggered by vacuum to know that it's done it's job and if the sensor gets stuck it will never turn on the gas. If your's have something like you will see a couple of rubber 1/4" hoses a foot long or so right out where you can see them.

NCarlsCorner2 · 01-01-2009, 11:50 AM

Quote:

Originally Posted by Saulbadguy

Hell if I know. I've given up trying to **** with the thing and will call a service technician tomorrow.

I am a service tech.

NCarlsCorner2 · 01-01-2009, 11:51 AM

Quote:

Originally Posted by tmax63

My furnace has a fan that kicks on before ignition to purge the combustion chamber of any gas/fumes that may have collected prior to kicking on the ignitor and gas. It has a sensor that is triggered by vacuum to know that it's done it's job and if the sensor gets stuck it will never turn on the gas. If your's have something like you will see a couple of rubber 1/4" hoses a foot long or so right out where you can see them.

That's your inducer motor, but if it's making a hissing noise that is the gas valve opening up which cant happen if the pressure switch hasnt closed.

**Saulbadguy** · 01-01-2009, 11:51 AM

Quote:

Originally Posted by NCarlsCorner2

I am a service tech.

Want to come over and fix my furnace?

NCarlsCorner2 · 01-01-2009, 11:54 AM

Quote:

Originally Posted by Saulbadguy

Want to come over and fix my furnace?

I cant moonlight, but if your furnace will lite doing what I told you to do, you can remove the hot surface ignitor and take it to Johnstone Supply and have them match it up for you.

blueballs · 01-01-2009, 12:05 PM

take the door off the microwave
place a PLASTIC spoon handle in the latch catch
high defrost

Moon§hiner · 01-01-2009, 12:12 PM

Quote:

Originally Posted by NCarlsCorner2

If you want heat, take a lighter and when you hear that hissing noise put the flame down there by the burner where the hot surface ignitor is located, once the gas hits the flame the burners will lite and heat up until the fan comes on, then you will know that it is the hot surface ignitor that is bad for sure, if the pressure switch was not closing due to a bird the gas valve would never be energized at all, so that would also rule out the pressure switch, if you turn on the fan at the thermostat and the fan comes on, you can rule out a tripped breaker, just from the syptoms that you have described I think your problem is a hot surface ignitor or the ignition module.

And if you follow the advice of this "tech", light it fast or you may not have any hair on your hands or eyebrows...lol...some advice is better not given when it comes to workarounds. Next thing will be advice on bypassing limits.

NCarlsCorner2 · 01-01-2009, 12:14 PM

Quote:

Originally Posted by Moon§hiner

And if you follow the advice of this "tech", light it fast or you may not have any hair on your hands or eyebrows...lol...some advice is better not given when it comes to workarounds. Next thing will be advice on bypassing limits.

If you put the flame below the burner with your hand out of the way he will be fine and you know it if your also a tech.

They have lighters know days that are long enough that he wouldnt even have to put his hand inside the furnace.

Moon§hiner · 01-01-2009, 12:17 PM

Oh I am....been doing it for 15 yrs....I'd never tell a homeowner to do that...that's all I'm saying. I've seen too many homeowners that don't have the common sense to change their filters to expect them to not get burned by playing with something they have no knowledge of.

12-31-2008, 09:29 PM
Saulbadguy When a nightmare becomes real Join Date: Nov 2003 Casino cash: $2266966	Furnace Question. My furnace stopped working. When I turn on the heat, it runs for a few minutes and then shuts off. It won't kick on the fan automatically, so no air is blown at all. When I put the fan on "ON" it just blows cool air. After it runs for a few minutes I have to flip the on/off switch on the furnace to get it to run again, but then it just shuts off again. I did install a new furnace filter a few days ago, but I suspect that has nothing to do with this. Thoughts?
Posts: 46,971

01-01-2009, 11:15 AM	#46
mikeyis4dcats. Scarlett Johansson's boytoy Join Date: Nov 2006 Casino cash: $9555998	also, try removing the filter. Sometimes the wrong filter type will restrict airflow too much and the furnace will shut down.
Posts: 12,526

01-01-2009, 11:48 AM	#52
tmax63 Veteran Join Date: Apr 2007 Location: Colorado Casino cash: $3060400	My furnace has a fan that kicks on before ignition to purge the combustion chamber of any gas/fumes that may have collected prior to kicking on the ignitor and gas. It has a sensor that is triggered by vacuum to know that it's done it's job and if the sensor gets stuck it will never turn on the gas. If your's have something like you will see a couple of rubber 1/4" hoses a foot long or so right out where you can see them. __________________ An armed member of society is a citizen, an unarmed member is a subject.
Posts: 3,816

01-01-2009, 12:05 PM	#57
blueballs Banned Join Date: Feb 2006 Casino cash: $10004900	take the door off the microwave place a PLASTIC spoon handle in the latch catch high defrost
Posts: 14,233

01-01-2009, 12:17 PM	#60
Moon§hiner Starter Join Date: Aug 2000 Location: Kansas, USA Casino cash: $10005272	Oh I am....been doing it for 15 yrs....I'd never tell a homeowner to do that...that's all I'm saying. I've seen too many homeowners that don't have the common sense to change their filters to expect them to not get burned by playing with something they have no knowledge of. __________________ "A computer lets you make more mistakes faster than any invention in human history- with the possible exceptions of handguns and tequila"
Posts: 401