Can you bypass thermostat?

As you’ll see in this video, It’s possible to “jumper” your thermostat to bypass it. This technique is usually used to identify a faulty thermostat before you replace it but can also be used to get they system working temporarily.

How do I trick my AC thermostat?

The trick is to use something to heat up the area around the thermostat. For example, taking a microwaved heating pad and putting it next to the thermostat for a couple of minutes should be enough to raise the air temperature to the point where the air conditioner will kick on.

How to bypass a thermostat to test it?

Twist the R wire and the G wire together. Turn the power on to the HVAC at the circuit breaker. The fan should now be operating. Turn the power supply off after the test and untwist the wires. If the HVAC passed all of these tests, the thermostat is faulty and needs to be replaced.

How can I test my furnace without a thermostat?

Turn the circuit breaker to the HVAC unit on. The furnace should start when the power is connected. Turn off the circuit breaker and untwist the R and W wires. Twist the R wire with the Y wire and make sure that the other wires are separated. Turn the power back on to the HVAC and check to see whether the air conditioning system comes on.

What to do if your thermostat is not working?

If the your heating, ventilating and air-conditioning unit is not coming on or shutting off at desired temperature settings, you could have a faulty thermostat. The convenient way to know whether your thermostat is at fault is to test it with a volt-ohm meter.

What’s the best way to remove a thermostat cover?

Use a flathead screwdriver to remove the thermostat cover plate. There will be a slot to place the blade of the screwdriver between the faceplate and the main body of the thermostat.

Twist the R wire and the G wire together. Turn the power on to the HVAC at the circuit breaker. The fan should now be operating. Turn the power supply off after the test and untwist the wires. If the HVAC passed all of these tests, the thermostat is faulty and needs to be replaced.

Turn the circuit breaker to the HVAC unit on. The furnace should start when the power is connected. Turn off the circuit breaker and untwist the R and W wires. Twist the R wire with the Y wire and make sure that the other wires are separated. Turn the power back on to the HVAC and check to see whether the air conditioning system comes on.

How do I check the AC on my thermostat?

Turn the meter dial to measure 24 volts AC (usually denoted by “VAC” or “V” with a squiggly line over it). Touch one of the meter probes to the R terminal (to which the red wire is attached) and the other probe to the G, W or Y terminal and note the reading.

How do you test the power wire to the thermostat?

Test the power wire to the thermostat. Using a multitester, switch the tester to a range that will measure 24 volts AC. Clip the red lead to the power wire and the black lead to the negative wire.