What happens if you incorrectly wire thermostat?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What to do if your thermostat wire is not working?
This involves disconnecting the wire at both units and reconnecting a new thermostat wire. Turn the power off to both the furnace and the air conditioning unit. Turn them off from the circuit breaker panel to be safe. Open up the furnace access panel and locate the terminals the thermostat wire is connected to.
Where does the white wire go on a gas thermostat?
W – white wire – this wire goes to the gas controls to engage the heat on a call for heat from the thermostat when you have it set to heating mode. That closes the 24-volt control side of the gas furnace, and begins the process of starting the gas furnace into its sequence of operation.
How do you run a new thermostat wire?
Running New Thermostat Wire. The keyword there is “may” solve our problem. If the wire is not long enough for a proper termination at the new thermostat then take a small piece of thermostat wire about 6 inches long and use a small wire appropriate for #18 solid wire and wire nut the short piece to the 6-inch wire.
What to do before taking old thermostat from wall?
Before you take the old thermostat from the wall have a pencil or pen nearby. As soon as you get the wires loose and the old sub-base of the old thermostat out of the way take the pencil or pen and wrap one of the wires around it.
Where to get new wire for gas thermostat?
After you get the wire and all the tools listed above then you need to fish the wire through the wall and to either the crawl space, basement, and in some cases the attic. The key is that you must get the new wire from where the t-stat is located to where the gas furnace or air handler is located.
What should I do if my thermostat is not working?
Loosen the thermostat body mounting screws with a screwdriver. Inspect the wiring on the base. If there are any loose wires or wires that are cut or corroded, they should be clipped, stripped and reattached to the terminal screws. Replace the thermostat body plate.
Is there a problem with a 4 wire thermostat?
4 Wire or 5 Wire Thermostat Wiring Problem – Question: We have a 19-year-old condo with an old Carrier mercury thermostat. We have both a natural gas furnace and an AC unit. There are only four wires going into the existing thermostat – red, green, blue, white.
Before you take the old thermostat from the wall have a pencil or pen nearby. As soon as you get the wires loose and the old sub-base of the old thermostat out of the way take the pencil or pen and wrap one of the wires around it.
