I recently installed the RTH6300B programmable thermostat. The a/c worked fine after installation, but I am now trying to get my gas furnace fired up and am having a problem with the pilot light staying lit on the furnace. I'm wondering if I have installed the thermostat improperly so that it doesn't convey the right signal to the furnace?? I had 4 wires coming out of the wall, G, Y, W, R and have hooked the R to the R on the thermostat. There is a jumper from R to RC and I'm wondering if the jumper needs to be raised up?? Does it stay down?? Could this be why my pilot light won't stay lit?? I've used the furnace for the past 10 years with no problems lighting the pilot, and the only new thing is the thermostat. Help please... I'm tired of being cold at night!! Thanks.

I'm not the greatest at gas I am hvac certi. But I do know your jumper wire has a lot to do with your furn. I can't tell without seeing but make sure you got the right kind of therm. It has to be one that works for gas! A standard therm won't work on gas

How old is your furnace, what make and model is it. If it has a standing pilot, the thermostat shoudnt have anything to do with the pilot staying(or not staying) lit. Most likely you have a bad thermocouple. Let me know what you think.

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Originally Posted by nathen171

im not the greatest at gas i am hvac certi. but i do know your jumper wire has a lot to do with your furn. i can't tell without seeing but make sure you got the right kind of therm. it has to be one that works for gas! a standard therm won't work on gas

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I`m wondering why

Okay, so you hold in the pilot knob, light the pilot. Does the pilot light while you are holding in the knob?. Im assuming yes. When you let of the knob(after holding it for a minute), the pilot goes out? If so, you need to replace thermocouple, end of story(there is a very small chance that it is a bad gas valve, wouldn't even think about that until you replace thermocouple)..

If you can't even get the pilot to light, then you probably have a plugged pilot orifice. Let me know what's going on, and I would love to help. As of right now, I feel like I'm typing to myself.

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Originally Posted by nathen171

im not the greatest at gas i am hvac certi. But i do know your jumper wire has a lot to do with your furn. I can't tell without seeing but make sure you got the right kind of therm. It has to be one that works for gas! A standard therm won't work on gas

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Huh!!

The jumper goes from Rh to RC unless you have a dual transformer system. The stat will have nothing to do with your pilot not staying lit.

I agree that nathan didn't make much sense, but lets try to help the asker, shall we.

I am trying lol. He asked about the jumper wire.

Yep, can't help the unhelpable