I relocated thermostat in house with a new one 3 weeks ago and have had nothing but problems since first i had to unplug line at trap then replaced capacitor on induction and now it seems the ignitor is shot. how can i narrow down whats going on as wheather is changing fast? also i reversed polarity at switch
If you have furnce manual check how wires from thermostat to controller are suppose to be wired. Then verify they are correct location red to red white to white etc.
i have run into problems after changing thermostat becuase we assume installer placed wires in correct locations at controller. (My son installing smart thermostat showed me a blue wire on his controller when there was no blue wire called out, the installer ran out of wire and after much searching we found the splice). So start over and verify correct colors are in use, or tag the color if in wrong spot. Draw a diagram of controller to help you wire thermostat.
SOURCE: intertherm gas furnace
Need more info. Are you saying that when tstat calls for heat then it short cycles. But if you turn it off then back on it runs ok?
SOURCE: Furnace doesn't reach desired temperature
One of two things you can try. Do you own a volt ohm meter? Anytime your unit cycles short like it is doing the control circuit which on this one is 24 volts that engages relays and controls the gas valve to open and close. I am thinking the heat exchanger is getting so hot it is tripping the upper limit which for the most part is around 180 degrees. So next time it turns off take your ohm meter and with the power to the whole unit off. Either turn the breaker off or there is a light switch that is real close to unit turn it off. Undo the two wires to the gas valve and ohm them out. You should have continuity if you get nothing check each limit switch should have a couple. Undo wires to them and check. If you find one that is open more then likely the upper one. They are a safety device that keeps the unit from getting too hot.
There might be another option increase the speed of your fan motor to get the heat out of furnace quicker. Look at the circuit board notice the fan wiring going to it. The Red wire from fan is low speed look to see if it is on HEAT on the board. You should have 4 speeds to pick from you could take the black off of COOL and swap wires and test the unit by doing that. I'm going to put a solution on this so I can come back to it quicker. Even though we a just testing it for now. ken
SOURCE: Carrier furnace blows heat constantly!
recheck your wiring iunside of the furnance around where yuou were working, you may have wired it wrong.
SOURCE: i replaced control board and
Hi,
I am assuming here that you are working with a York furnace...
They are a royal pain in the rear with that polarity business!!!
To check the polarity you will need an electric meter and then pull apart the box where the electric enters the furnace...
The WHITE wire should be the neutral or have no power when grounded...
The Black wire should be the hot wire and have power when grounded...
Also the ground wire must have a very good connection to the ground wire that goes outside the house into the ground rod...
I have had an instance when I had to drive a totally separate ground rod and ground the furnace directly to it as the power co. ground interfered with the house ground...of course they will never admit to such a thing...
Anyway... this checking and possible grounding should get you working again...
heatman101
SOURCE: Payne Furnace will not ignite-Inducer starts but
What ya got is a limit popped out
Look for more than one of these puppy's in the circuit.
About the twinning and the reversed polarity if this was a new install with trouble yeah that might be it but this one was working and has recently took a dump correct? Look for reasons why a limit would pop out like blocked vents dirty filters and rusty burners. Reset that puppy and correct those things that are causing the air restriction . 
If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61
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