Honeywell CT87B ROUND HEATING&COOLING MECHANICAL THERMOSTAT - WHITE Heater "thermostat short circuit" Questions

short in the thermostat or in the wires coming from the thermostat. The red and white wires are for heat. If you open the filter door, there should be terminal screws labeled R, W, Y, G and the 4 or 5

...thermostat wires from the circuit board. Tape door switch closed. Put a jumper on R and W on the circuit board. Let the heater run for about 5 min. Disconnect the jumper, furnace should shut down. If ...

...thermostat. If you do not have 24 volts, then you need to determine whether or not you have 240 volts to your air handler. If you do not have 240 volts, check for a tripped circuit breaker or blown ...

...replaced fuse, turned on fan, it works, set thermostat to heat and fuse blows.again and again Short circuited component/s at its internal circuit

...the wires from the thermostat and touched both terminals on circuit board and it sparked now the furnace wont even ignite you may have well blowen the pcb check the fuses or trip switch in elec ...

circuit for cooling can also activate the fan control relay depending on the control logic set up. So the thermostat has the ability to activate the fan either by the (auto/on) or cool cycle if an A/C

...thermostat to line going to condenser contactor (24V side). Are you talking about the small 3 or 5 amp fuse in the furnace? If you are then the control voltage circuit to the condenser is shorted, ...

...thermostat my thermostats will not turn on. the on/off switch has a short. It will light for a micro second and won't stay on. The switch has been ''touchy'' but it has finally broke. Is there a ...

...thermostat 5000 series, controlling a gibson heat pump. Any suggestions on how to analyze and fix. if you have a meter on the indoor unit locate the transformer and check to see if getting 24v ac on ...

...check before turning it back on? Is it indicative of deeper problems? Same problem i had on the XT24, found out that it was the thermostat shorting out the circuit, changed thermostat and worked