Life Any Hvac techs out there - Page 2

**J Diddy** · 02-01-2011, 02:35 PM

Is it possible that snow build up in the exhaust pipe going through the roof could prevent the inducer motor from activating thereby preventing my heater from coming on?

**J Diddy** · 02-01-2011, 04:13 PM

Quote:

Originally Posted by NCarlsCorner2

I work in HVAC, so let me know and i'll try and help you, is it a standing pilot or HSI, if you have a inducer motor that is the first thing that needs to come on.

It is not, it is a standing pilot

NCarlsCorner2 · 02-01-2011, 04:17 PM

Quote:

Originally Posted by MotherLover

It is not, it is a standing pilot

Then you could just have a bad thermocouple, turn the knob on the gas valve to pilot and try to light it, if the pilot head is dirty you might not be getting a good flame on the thermocouple therefore it won't stay lit.

**J Diddy** · 02-01-2011, 04:28 PM

Quote:

Originally Posted by NCarlsCorner2

Then you could just have a bad thermocouple, turn the knob on the gas valve to pilot and try to light it, if the pilot head is dirty you might not be getting a good flame on the thermocouple therefore it won't stay lit.

the pilot is lit, I put it out then relit it

NCarlsCorner2 · 02-01-2011, 04:31 PM

Quote:

Originally Posted by MotherLover

the pilot is lit, I put it out then relit it

Do you have a good flame hitting the end of the thermocouple, make sure the knob is now turn to the on position at the gas valve and calling for heat at the thermostat, also make sure you have changed your filter so it doesn't go out on high limit.

NCarlsCorner2 · 02-01-2011, 04:37 PM

Did the furnace come on?

**J Diddy** · 02-01-2011, 05:02 PM

Quote:

Originally Posted by NCarlsCorner2

Did the furnace come on?

Lol after him piddle farting with the electrics in it, I finally convinced him to try my theory. We went on the roof, cleared around the pipe which was encased in approximately 3 foot snow drift and whammo. We got heat, I'm cranking that up to 85 which should keep it running all night and hopefully keep it cleared.

NCarlsCorner2 · 02-01-2011, 05:07 PM

Quote:

Originally Posted by MotherLover

Lol after him piddle farting with the electrics in it, I finally convinced him to try my theory. We went on the roof, cleared around the pipe which was encased in approximately 3 foot snow drift and whammo. We got heat, I'm cranking that up to 85 which should keep it running all night and hopefully keep it cleared.

That's not the problem though, if the furnace had been working it should have never let the snow pile up due to the heat from the flue gas, if the pilot goes out again change the thermocouple, glad it's working.

**J Diddy** · 02-01-2011, 05:11 PM

Quote:

Originally Posted by NCarlsCorner2

That's not the problem though, if the furnace had been working it should have never let the snow pile up due to the heat from the flue gas, if the pilot goes out again change the thermocouple, glad it's working.

Definitely, will pass that on. Kinda hard to do anything right now though, lol. Like I said 3 feet of snow on a flat trailer roof.

Thanks for the help sir.

**chefsos** · 02-01-2011, 05:33 PM

Quote:

Originally Posted by MotherLover

Definitely, will pass that on. Kinda hard to do anything right now though, lol. Like I said 3 feet of snow on a flat trailer roof.

Thanks for the help sir.

Mr. Landlord needs to get that shit off of there pronto.

**Saul Good** · 02-01-2011, 06:18 PM

Quote:

Originally Posted by chefsos

Mr. Landlord needs to get that shit off of there pronto.

Yep. You're gonna have 3 feet in your living room, otherwise.

googlegoogle · 02-01-2011, 07:35 PM

Damn thermocouples. Worse than a flux capacitor.

JD10367 · 02-01-2011, 08:29 PM

Quote:

Originally Posted by NCarlsCorner2

I work in HVAC, so let me know and i'll try and help you, is it a standing pilot or HSI, if you have a inducer motor that is the first thing that needs to come on.

Tech talk is so hot. I think I just felt my thermocouple stir.

**J Diddy** · 02-01-2011, 08:40 PM

Quote:

Originally Posted by googlegoogle

Damn thermocouples. Worse than a flux capacitor.

BS, I've never had to get my trailer home up to 85 for it to work.

jd1020 · 02-01-2011, 09:36 PM

Quote:

Originally Posted by NCarlsCorner2

That's not the problem though, if the furnace had been working it should have never let the snow pile up due to the heat from the flue gas, if the pilot goes out again change the thermocouple, glad it's working.

You should work on your HVAC, tbh. This isn't an uncommon problem when it comes to high effiency furnaces. If the exhaust is blocked the inducer fan is not going to be creating enough pressure to close the switch and continue with the order of operations. A heavy snow like today will cover the exhaust. This is why there are regulations for the height of the exhaust exiting a rooftop or sidewall.

Hog's Gone Fishin · 02-01-2011, 09:52 PM

Quote:

Originally Posted by Bugeater

Well, I can tell you this much, if it's not getting adequate ventilation, you're better off with the furnace not running because carbon monoxide can back up into your house. I suppose there may be some type of sensor that shuts the furnace down in the event of a CO backup. I could probably give you a better answer in May after I've completed my gas heat course.

For some people carbon monoxide can be a good thing.

02-01-2011, 02:35 PM
J Diddy Don't Be A Dick Join Date: Aug 2001 Location: Joplin Casino cash: $6537192	Any Hvac techs out there Is it possible that snow build up in the exhaust pipe going through the roof could prevent the inducer motor from activating thereby preventing my heater from coming on?
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02-01-2011, 04:37 PM	#20
NCarlsCorner2 Starter Join Date: Feb 2006 Location: Liberty,Mo Casino cash: $10004900	Did the furnace come on?
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02-01-2011, 07:35 PM	#26
googlegoogle Banned Join Date: Nov 2008 Casino cash: $10004900	Damn thermocouples. Worse than a flux capacitor.
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