Question about Heating & Cooling
RED IS 24 V POWER INTO T STAT
WHITE IS HEAT GOES TO WHITE ONN FURNACE.
YELLOW IS COOL GOES TO THE CONDENSING UNITS CONTACTOR WITH SOMETIMES MAKING A CONNECTION ON THE FURNACES LOW VOLTAGE TERMINAL BOARD, LVTB, BUT IT NEED NOT, AS IT DOE NOTHING HERE, IT DOES OUTSIDE WITH THE 24V COMMON OR NEUTRAL LEG OF 24 V POWER.
GREEN IS FAN/HIGH/COOL SPEED AND GOES TO GREEN ON THE FURNACES LVTB.
COMMON IS THE 24 VOLT NEUTRAL AND WHERE EVERY CIRCUIT TERMINATES OR ENDS TO COMPLETE THE CIRCUIT.
Posted on Feb 25, 2012
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Posted on Jan 02, 2017
Tips for a great answer:
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Unplug the dryer's power cord from the wall connection. You will be working around the dryer's wiring, which can be dangerous if the power is connected.
Remove the rear cover of the dryer. Most dryers have four screws, one at each corner. Flathead screwdrivers will work for most models, but some require Phillips-head screwdrivers.
Locate the thermostat. The thermostat is circular or oval with a wire connection on each side. Remove the screws keeping the wires connected to the thermostat. Set them aside--you will be reusing them to install the new thermostat.
Disconnect the thermostat from the wires, then unscrew the thermostat from its mounting bracket. The thermostat will easily pull away from the wires once you have removed the screws. Discard the old thermostat.
Install the new thermostat on the mounting bracket. Be sure to tighten the screw enough to keep it secured. Connect the wiring to the thermostat and reinstall the screws to hold the wiring in place.
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Here is a tip that explains the wiring and the color designations...
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