Question about Honeywell Programmable Thermostat Heater

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Honeywell Thermastat rth2308

I have been hearing my gas shutting off and quit a bit latley/ it is not something that is happening all the time but when it comes 0n i do notice that it is only a matter of seconds before is comes back on. b ut won't stay on all the time as well.
got any Ideas? plus I might add that I have changed the thermostat on the wall and it seems to be workiing ok, I even put it on the manual mode instead of the programable mode got any Ideas as to what I can do ?

a very greatful questionor. Tina

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Yes you can fix it in 10 min.
You wasted your money on thermostat. Problem is your flame sensor. your Furnace has a safety. When it dosen't sense the flame because of crotion build on the sensor it shuts itself off in 3 seconds. flame sensor is on the right or left side infront of the burner. it is about 2.5 to 3 inches long and about the size of Q tip. it is mounted with one or two #6 hex or sloted head screw. You may or may not have to take it out depends on what is in the way and how big is your hand ! any way you will have to run to the hardware store and buy a sheet of very fine grid SAND PAPER. Clean it very good with it. If you have Glow igniter that ignite the furnace. DO NOT TOUCH THAT. It looks like round spiral or W shape. you can't miss it thats the one that starts the fire. DO NOT TOUCH THAT. but you can clean the sensor without messing with the Igniter. you can only Clean the sensor 3 to 5 time then you will have to buy a new one. you can click on this link to know what sensor looks like.

Please let me know if that works for you.
look at the igniter link you don't want to mess with this part.

Good Luck

Posted on Mar 07, 2008

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