I have just relocated the thermostat connected to a ComfortMaker model C9MPV075F12C1 furnace and now the furnace will not turn on. I was very careful in labeling the wires before disconnecting and the furnace worked fine before the change. The diagnostic LED is flashing ''heartbeat'' indicating no problems. Any suggestions?
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Re: Furnace will not kick on.
Sounds like you have a problem with your module, it is kind of triky troubleshooting the module you have to know what you are doing, and becides it is a spencive part,and perhaps you may want to try to buy it.Or we can try something alse like whats your location?
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Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.
Most furnace operating on Oil or gas will heat the combustion chamber before starting fan to prevent cold air draft at start-up, can last a minute or two. Eiter the main flame does not come on or the chamber thermostat have fail. Try to modify fan option on room thermostat from auto to on. Cold air coming out: burner problem or no more oil or gas, warm air: burning chamber thermostat problem, leave room thermostat fan option to on until repair.
SHUT THE POWER OFF TO THE FURNACE, REMOVE THE THERMOSTAT FROM THE THERMOSTAT SUB BASE TAKE THE WIRE THAT IS ON THE R TERMINAL AND THE WIRE THAT IS ON THE W TERMINAL AND CONNECT THEM. TURN THE POWER BACK ON. IF THE FURNACE COMES ON AND WORKS FINE THEN ITS IN THE THERMOSTAT.
Is this an oil or gas fueled furnace? All heating appliances have several safety switches in the controls. Flicking the on/off switch (assuming you mean the emergency toggle switch) is not resetting the burner. If you pressed a button near the red light,that MAY have been the primary control reset. Your problem could be anything from the main power switch to one of the many controls with a wiring or sensor issue. Or even a t-stat wire problem. Regardless, a thorough technician should be checking the entire circuit, from the t-stat to every control in the circuit. Including every wire. Lastly, a qualified licensed technician should never diagnose without being in front of the appliance. Hope this helped :)
Make sure you have gas to the unit and the switch on top of valve is turn to on. Can you here the gas valve click? It igniter comes on and a delay and the gas valve should come on. Kill power to furnace to reset control board. Rus Let me know how it goes.
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.