Why is the air conditioner thermostat showing a blank screen
Find out why your thermostat may not be working and what to do in the different cases.
Thanks to the thermostat, we can turn the air conditioning system on and off and set different settings to enjoy maximum comfort—that's why it is a very important part of the air conditioning components. You might be surprised to see that the thermostat shows a blank screen. It is possible for this to happen as there are many potential causes. Don’t worry because some of them are not always related to any malfunction in the system.
10 reasons why your thermostat shows a blank screen
Whether the thermostat display is not working or there is a power problem, the first thing you need to do is find out the cause.
1. The thermostat is off
Even if it seems counterintuitive, the cause may actually be quite simple - the thermostat may simply not be on. This is possible, as you probably aren't the only one with access to it. For example, your child may have turned it off and forgotten to turn it on. Another very likely cause is a power cut.
Check the power supply, try turning the thermostat on a few times - if the screen is still blank, try the following tips to diagnose the problem.
2. Low batteries
Have you considered that your thermostat is running on batteries that may be dead? That is the next completely harmless cause of the dead display. Batteries usually last from one to several years, but it's also possible to run out in a few months. The next step is to replace them and try turning the thermostat back on.
Different models of thermostats may be changed differently, but usually, the battery compartment is easily accessible, so you shouldn't have any trouble.
3. Circuit breaker disconnected
It is likely that the thermostat is connected to a circuit breaker that other appliances are connected to as well. If the circuit is overloaded, this circuit breaker will trip, and so all appliances connected to it will shut down.
So the next step we recommend you take is to check if the circuit breaker has tripped and reset it. Usually, when triggered, the position of the switch is neutral - between "On" and "Off". You need to first switch to the "Off" position and then to "On".
It is likely that the thermostat is connected to a circuit breaker that other appliances are connected to as well. If the circuit is overloaded, this circuit breaker will trip, and so all appliances connected to it will shut down.
So the next step we recommend you take is to check if the circuit breaker has tripped and reset it. Usually, when triggered, the position of the switch is neutral - between "On" and "Off". You need to first switch to the "Off" position and then to "On".
4. Dirty air filter
You may not have guessed that a dirty air filter could cause the blank thermostat screen, but it can! We'll explain why.
If you don't regularly clean your air conditioning system's filter, it will inevitably become contaminated with dust. If the contamination is severe, the airflow will be obstructed. In turn, this will affect the unit's efficiency and may even cause the thermostat to shut down. We advise you to clean or change the filter at least once a month.
5. Safety switch tripped
Some thermostat models have a safety switch. Its function is to protect the system from severe damage and is triggered if it senses a potential threat. An example of such a case is the freezing of the evaporator coils. When the problem is detected, the safety switch signals the system that there is a danger, and the thermostat shuts down.
Check that your air conditioning system has such a fuse and that it has tripped. This is a fault signal, so try to find out what it is or contact a professional technician.
6. Dirty wiring
If you don't use your device often, a lot of dust may have accumulated around the wiring. To check if this is the case, remove the thermostat cover and take a good look around for dust. Clean with a soft brush or use the cool air jet on your hairdryer.
7. A blown fuse
To check if there is a blown fuse, you will need to equip yourself with a multimeter. Usually, the fuse box is located on the outside of the home, near the air conditioner condenser unit.
Once you find the box, open it and check with the multimeter to see if any fuses have blown. If you find one, replace it with a new one. You can purchase a fuse from an appliance store or online.
8. Wiring problems
Not every wiring problem is visible. But it will certainly affect the thermostat's performance if there is one. To find out if it does, seek the help of a professional electrician.
9. Non-conforming parts
Consider whether you have recently replaced any of the internal or external parts of the air conditioner. When you purchase your unit, it has all the components that are specifically designed to work efficiently. If replacing damaged parts results in one that doesn't match your system, it can affect the air conditioner's overall performance.
10. The thermostat should be replaced
Don't rule out the possibility that your thermostat may have reached the end of its life and need a new one. This is even more likely if you have used it for over ten years.
You can find many economical options on the market that may be more efficient than the one you were using before. However, it's always a good idea to check with the company you bought your air conditioning system from about what thermostat they recommend you buy.
If you need a new air conditioner, take a look at our suggestions on Midea.bg. Contact our team for a consultation.