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Honeywell gas furnace thermostat not working - Heating & Cooling

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Replace the battery first. If that does not work, try shorting the input to the furnace. If it starts, the thermostat or wiring are at fault. If not troubleshoot the furnace. I hope this helps.

Posted on Oct 22, 2013

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3 Answers

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Thermostats don't actually blow anything, the heating system might though. Check the breakers for your heat system, then call a heating specialist. They're really not that expensive.

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a Honda Civic, Honeywell furnace, is this a joke? LOL

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Honeywell manuals


Turn the fan in the ON position to verify you have power to the furnace. If the fan turns on, turn it back to AUTO. Pull the thermostat off the wall to get to the low voltage wiring. If you have a gas furnace, pull the red & white wires off and pinch them together. If the furnace starts, the thermostat is bad. If it doesn't start, then begin looking for flame roll out switches in the furnace burner compartment to manually reset. If the furnace inducer (combustion motor starts, & you get no flame, then it is either an ignition problem, or someone didn't pay their gas bill. :0

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Put a new honeywell thermostat on and heat won't come on


Take the thermostat off the wall & jumper Red wire to White wire. if your furnace kicks on, then either the thermostat is bad, or it is not connected to the correct terminals. BTW, I'm assuming this is a single stage gas furnace.

Nov 28, 2013 | Honeywell Heating & Cooling

1 Answer

Honeywell thermostat RTH6580WF heat is ok but a/c doesnt cool


Same problem here. Gas, hot air furnace with A/C. Fan works with heat, but not A/C. Furnace is old, and I had to move the G wire to C at the furnace, plus install a jumper from Y to G.

Apr 10, 2013 | Honeywell Programmable Thermostat Heater

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IT SOUNDS TO ME LIKE EITHER YOUR SYSTEMS LOW VOLTAGE WIRING IS INCORRECT, MOST LIKELY @ THE FURNACE. IT COULD ALSO SIMPLY BE THAT WHEN THE TECHNICIAN THAT INSTALLED THE T-STAT AT START-UP DID NOT GO THROUGH THE INSTALLER SET-UP & CHOOSE THE CORRECT SETTINGS FOR A DUEL FUEL SYSTEM. TRY THIS " SET THE THERMOSTAT TO EMERGENCY HEAT, WAIT A MINUTE OR TWO & SEE IF THAT TURNED GAS FURNACE ON. IF SO THEN IT'S A SIMPLE FIX IN THE WIRING OR PROGRAMMING & NOT SOMETHING MAJOR! GOOD LUCK!

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I have a honeywell thermostat model # th5220d1003-0636 & need to know what connections to make for gas forced air heat.


This is a Focus Pro 2 heat,2 cool thermostat. If you are connecting this to a single stage(1 heat) residential furnace then your connections are: At the thermostat the R and Rc therminals are internally connected so you can connect your R terminal wire from the furnace to the R terminal at the thermostat(this is your 24 volt supply for both heating and cooling. The W or W1 wire (heating) from your furnace you connect to the W1 terminal at the thermostat. The W2 wire from your furnace(if your furnace is a 2 stage furnace) you connect to the W2 terminal at the thermostat. The G wire from your furnace(indoor fan) you connect to the G terminal at the thermostat. The Y1 wire(cooling) from your furnace you connect to the Y1 terminal at the thermostat. The C wire(common or neutral) from the furnace you connect to the C terminal at the thermostat.

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1 Answer

My husband just installed the Honeywell RTH2310 thermostat. The fan turns on, but the furnace does not. What's our next step? (It's a natural gas furnace and he made sure that it is on correct h/e setting....


need to make sure there is a jumper between RC and RH if the red wire is connected to the RC terminal the heat wont work you will need a jumper wire to tie the RC and RC together with the red wire.

Oct 20, 2009 | Honeywell Focus 6300B 5-2 Days...

1 Answer

New honeywell thermostat on new gas furnace not working


sometimes there's a differential setting anywhere from 1-3 degrees, see if you can make sure it's down to 1

Nov 12, 2008 | Honeywell Programmable Thermostat Heater

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