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Thermostat circuit breaker.
Put the battery in opposite direction the negative side is placed to positive and positive side is placed to negative.
Put the battering again the right way.
If the circuit breaker trips it may shut off the power to your thermostat clearing the screen.
It looks like the large 50a 2 pole breaker does control the outside ac unit but doesn t affect the heat or the fan.
You get to sit back watch some tv make lemonade or do something else relaxing until the next step.
This can cause the circuit breaker to trip which will shut your thermostat off.
Depending on how your home is wired your thermostat may be on the same breaker as another appliance or device that draws a surplus of power hair dryer anyone.
Now go to the circuit breaker and switch it off.
Then you have to test the thermostat by turning the breaker to the on position.
Turn the thermostat back on after 30 minutes check to see what your thermostat is set to.
If this is the case fixing this problem requires nothing more than flipping the circuit breaker switch.
Remove the thermostat and take out the 2aaa batteries from it.
Some thermostats are on the same breaker as other devices that draw too much power like a hair dryer for example.
Switch off the thermostat.
If the thermostat has an issue it blows a small transformer or fuse in the blower unit.
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The circuit breaker tripped.
The circuit breaker inside the actual ac unit needs a reset as well and that s what it ll do during the 30 minute break.
Commonly the circuit breaker is tripped.
Take a look at your circuit breaker and see if it needs to be reset.
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You have to check the circuit breaker first and then try to switch the breaker to the off position.
Be sure that the thermostat remains off so that your air conditioner s internal circuit breaker can reset.
Thanks for the comments.
If the thermostat is working normally just like before it means there is nothing to worry about.
If the breaker is tripping it is because of a motor or compressor in the high voltage side.
Wait for 5 10 seconds and take the batteries out.
Wait 30 minutes with the air conditioner off.
This can t happen if the thermostat is signaling for cooling.
The thermostat is in a different circuit than the circuit breaker.