Table of Contents
- 1 What causes an AC thermostat to go blank?
- 2 What causes thermostat to lose power?
- 3 What do you do when your AC thermostat stops working?
- 4 Where does the thermostat get power from?
- 5 How do I know if my thermostat is malfunctioning?
- 6 What happens when the battery on a thermostat dies?
- 7 Why does my thermostat go blank when I turn it on?
What causes an AC thermostat to go blank?
This is commonly due to restricted airflow because of broken or dirty parts in the HVAC system. A failing fan motor can cause your electrical components to pull in more amperage than usual, tripping the high-limit switch. Any of these could cause a blank thermostat screen.
What does it mean if your thermostat goes blank?
Thermostat Batteries Died and Need to be Replaced If your thermostat is blank, the first thing you should do is check the batteries. Chances are, the batteries have died and the thermostat simply can’t power on. Replace the batteries and see if your thermostat turns on.
What causes thermostat to lose power?
The power is out or a circuit breaker has tripped The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Many thermostats run on low voltage sent from the transformer on the HVAC system; if the transformer loses power, so will the thermostat.
How do I fix an unresponsive thermostat?
If the thermostat is still unresponsive, make sure the breaker is shut off and remove the cover. If it looks dirty inside, use canned air or a soft artist brush to clean away accumulated grime that may be affecting its functionality. Then look for issues like loose wiring or terminal screws and tighten them up.
What do you do when your AC thermostat stops working?
Here are the steps you need to take to reset your AC thermostat.
- Shut Down Your AC at the Thermostat.
- Find Your Circuit Breaker Box.
- Reset the Circuit Breaker for Your AC Unit.
- Wait 30 Seconds.
- Turn the AC Thermostat Back On.
- Call Vredevoogd Heating & Cooling for all your Furnace & AC needs.
Will AC work if thermostat batteries are dead?
When your thermostat batteries die, you will see a black screen, the thermostat will stop working, and the heating or cooling units will not work. If, after the change of batteries, the thermostat and the heating and cooling systems start working, then everything should be back to working as normal.
Where does the thermostat get power from?
In fact, many thermostats are powered by the 24 volts from the transformer. This transformer is located inside your HVAC equipment. This is what is referred to power stealing technology. However, if your HVAC equipment has low voltage, it can cause the screen on your thermostat to go completely blank.
How do I know if my AC thermostat is bad?
HVAC system won’t turn on: The most obvious sign of a bad thermostat is that the HVAC system in your building won’t turn on or respond to the thermostat. You should be able to turn on your heating or cooling system from the thermostat, or change operation back and forth from heating to cooling.
How do I know if my thermostat is malfunctioning?
Signs of a Bad Thermostat
- Your thermostat has no power or is unresponsive.
- Your A/C or heater runs constantly and won’t turn OFF.
- Room temperature and setting don’t match.
Why is my air conditioner thermostat not working?
Check whether the thermostat’s display is lit. If it is not, the thermostat cannot signal the air conditioner to cycle on. Look for and address simple reasons why the thermostat isn’t getting power, such as dead batteries or a tripped breaker or blown fuse in your main electrical service panel.
What happens when the battery on a thermostat dies?
Your thermostat will stop working and this will in turn affect the performance of your heating and cooling system. In order to save yourself the trouble of having to reset your thermostat when the battery dies, you can ensure you take into account the thermostat low battery symptoms and replace them before they die.
Why does my thermostat turn off when I Turn on the AC?
Most new furnaces and air conditioners have safety sensors, sometimes called a float switch, wired to the thermostat. If the sensor detects high moisture, it will turn the system off. In many instances, these safety switches misread their surroundings and simply need to be reset, but it could also indicate that you have a clogged AC drain line.
Why does my thermostat go blank when I turn it on?
This is another ‘silly’ thing that can cause your thermostat to go blank. The batteries in your thermostat can last as long as five years or as little as a few months – so if your thermostat is turned on but still blank, try swapping out the batteries.
Why does my thermostat keep clearing the screen?
If the circuit breaker trips, it may shut off the power to your thermostat, clearing the screen. If this is the case, fixing this problem requires nothing more than flipping the circuit breaker switch back on. 2.