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Why Your Thermostat Display is Blank

A working thermostat is essential to have a comfortable life in the Sunshine State. Yet, it’s very easy to take it for granted, walking right by it on a daily basis without giving it a second thought. The day it stops working, though, it suddenly becomes the center of your universe.

Why Do I Have a Blank Thermostat Display?

There’s no one-size-fits-all answer to this question. There are several reasons why your thermostat may have suddenly decided to take a break. Below is a list of the most common reasons.

1. Somebody Turned It Off

You may want to laugh or roll your eyes at this one, but unless you live by yourself, it’s always a possibility that someone got too cold and thought that the best solution would be to turn it off. So before you get stressed, make sure it’s actually turned on.

2. LCD Brightness Display Is Too Low

Some thermostats allow users to adjust the display’s brightness. Those that do will typically adjust automatically depending on how much light is around it. You could check the user manual to see if you can adjust it manually, or increase brightness around the thermostat for the display to become darker.

3. Batteries Died

Depending on the model of your AC system, you’ll either see a low battery indicator on the screen, or you may hear a low beeping sound every now and then. Always take note of when this happens to avoid running out in the most inconvenient of times, such as the middle of the night or during a thunderstorm.

4. Dirt Inside the Thermostat

Airborne particles can make their way inside a thermostat. This is even more likely if someone in your home smokes or if you like to burn scented candles. Remove the cover and clean the wiring with canned compressed air.

5. Tripped Circuit Breaker

If you’ve been running too many appliances at once, or if there was an electricity surge in your home, a circuit breaker may trip. Go to the breaker panel and look for the switch that’s labeled “AC”. Each switch has three settings: “On”, “Off”, and middle. When a breaker trips, it’ll be set to the middle setting. Switch it to “Off” before turning it back “On”.

6. Tripped Float Switch

Air conditioners work by absorbing the warm air from inside your home, taking the moisture out of it, and blowing the cooled air through return vents. When moisture is removed, water droplets drain into what’s called a drip pan. This water is then drained out of your home through the air conditioner’s condensate line. If the condensate line is clogged, water won’t drain properly and the drip pan will become too full of water. When this happens, the float switch in your air conditioner will become activated and shut off your air conditioner.

7. Blown Fuse

While circuit breakers are designed to protect home appliances from power surges, some thermostat models have a fuse inside for an extra level of protection. To check if your fuse is working, walk to the outside of your home, where the AC condenser unit is located. There’s a small box with a lid on the exterior wall. Lift the lid and take out the fuses and test the voltage with a multimeter. If a fuse is dead, buy a replacement at any hardware store.

8. You May Need to Replace Your Thermostat

If you’ve tried all of the troubleshooting explained above and your thermostat remains blank, call an HVAC professional to help you determine whether it’s time to replace your thermostat, or whether you’re dealing with a more complicated issue, that can still be repaired.

Call HVAC Professionals in Broward, Palm Beach, or St. Lucie

At Sansone Air Conditioning Electrical & Plumbing, we provide HVAC services in for your home or business. If you live in Broward, Palm Beach, or St. Lucie, let us help you make sure your air thermostat is working as efficiently as possible.

Call us to hear about our specials or to schedule an appointment.

Broward: (954) 800-2858
Palm Beach: (561) 701-8274
St. Lucie: (772) 879-5656

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