# HVAC guys?
**URL:** https://forums.speedlife.net/t/hvac-guys/58096
**Category:** NYSpeed Off Topic
**Created:** [November 13, 2008, 9:48am UTC](https://forums.speedlife.net/t/hvac-guys/58096 "2008-11-13T09:48:35Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Spam16v](https://forums.speedlife.net/u/Spam16v)
#### Post date: [November 13, 2008, 9:48am UTC](https://forums.speedlife.net/t/hvac-guys/58096/1 "2008-11-13T09:48:35Z")
alright, big heater in the shop is acting up… it’s a large gas furnace. thermostat on the wall, transformer on the heater, pilot light is on, you can hear the click of the thermostat but no action. three terminals on the control TH, TH-TR, and TR, one wire from the thermostat goes to TR, the other thermostat wire goes into the transformer and comes out to the TH terminal.
any suggestions on how to bench test or verify what could be acting up?
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### Author:  [@justa4door](https://forums.speedlife.net/u/justa4door)
#### Post date: [November 13, 2008, 9:54am UTC](https://forums.speedlife.net/t/hvac-guys/58096/2 "2008-11-13T09:54:06Z")
thermal coupler
> **[Thermal coupler changed, pilot now stays on but gas to heat won't stay lit.Kicks...](https://answers.yahoo.com/question/index?qid=20081023025121AA0Acmw)**
>
> I have a weiland boiler. It needed a new thermal coupler. The thermal coupler now keeps the pilot lit. But now after the boiler lites to heat the house, it kicks off after a minute and even turning up the thermostat won't turn it back on even with...
[http://www.blurtit.com/q196123.html](http://www.blurtit.com/q196123.html)
> **[DoItYourself.com Community Forums](https://www.doityourself.com/forum/gas-oil-home-heating-furnaces/282764-thermal-coupler-didnt-fix-problem.html)**
>
> Question and Answer Forums for home improvement, home repair, remodeling, decorating, hardware, electrical, electronics, travel, health, investments, real estate, traveling, banking, investing, insurance, auto, vehicles, vessels, boats, campers,...
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### Author:  [@Spam16v](https://forums.speedlife.net/u/Spam16v)
#### Post date: [November 13, 2008, 10:03am UTC](https://forums.speedlife.net/t/hvac-guys/58096/3 "2008-11-13T10:03:32Z")
yeah, been looking online for info when i threw this thread up. hit the gas valve with a hammer and we now have heat…
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### Author:  [@Jim1234664](https://forums.speedlife.net/u/Jim1234664)
#### Post date: [November 13, 2008, 10:11am UTC](https://forums.speedlife.net/t/hvac-guys/58096/4 "2008-11-13T10:11:05Z")
was just going to say, gas valve. see if it has voltage but wont turn on. ours just went on the furnace, ~$300
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### Author:  [@chaztor](https://forums.speedlife.net/u/chaztor)
#### Post date: [November 13, 2008, 10:37am UTC](https://forums.speedlife.net/t/hvac-guys/58096/5 "2008-11-13T10:37:30Z")
replaced mine (called Auto Valve) myself ($170) after RG&E had red tagged it for leaking from the switch. Learned a lot about boilers and gas lines (they had red tagged a pipe elbow too).
I didn’t think to fix it with a hammer though. maybe next time. 😑
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### Author:  [@Spam16v](https://forums.speedlife.net/u/Spam16v)
#### Post date: [November 13, 2008, 11:00am UTC](https://forums.speedlife.net/t/hvac-guys/58096/6 "2008-11-13T11:00:00Z")
didn’t exactly haul off and beat it… just a tap with my little hammer and it fired up, might be a sign that it’s about to crap out.