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Grinding, Squealing and Screeching: Interpreting the Noises Your HVAC Makes

If something is failing or going amiss with your HVAC unit, chances are, your HVAC unit is letting you know something is not quite right. However, most of the cues come in the form of sounds that many of us may overlook. If you hear your HVAC unit grinding, squealing, screeching or squeaking, it is letting you know it needs help. I was unaware of these cues and overlooked them. It ended up costing me a lot of money in repairs. I want to make sure that does not happen to other people, so I made this website. I hope you learn how to interpret the noises your HVAC unit is making so you can get it the repairs it needs before you incur a costly repair, or worse, permanently ruin your unit for good.

Grinding, Squealing and Screeching: Interpreting the Noises Your HVAC Makes

Reasons The Thermostat For Your Air Cooling Appliance Is Blank

by Billie Carlson

Even though a thermostat is small, it is an indispensable component of an AC unit. As such, if your thermostat's screen suddenly goes blank, you may not be able to control your temperature settings. In addition, a blank thermostat will restrict you from turning your system on and off. Thus, you should hire an AC contractor to inspect your unit when this happens. They will ascertain the cause of the malfunction and fix it for optimal climate control. The following are possible reasons why your thermostat is blank. 

Tripped Float Switch 

A float switch is a safety feature that detects when the drain clogs. As a result, it shuts the system off to prevent further dehumidification. Thus, a water backup will trigger the float switch if your condensate line clogs with dirt and grime. Furthermore, if your evaporator coils freeze and thaw, they may cause excess condensation to drain from your unit. This causes a water overflow in the condensate pan, tripping the float switch. Consequently, the float switch will cut power to the thermostat, making the screen go blank. 

Old Thermostat

A thermostat will operate effectively when well-serviced and for a specific time. If yours exceeds this timeframe, it will wear out much faster and eventually fail. As a result, the thermostat will go blank, rendering your AC unit inoperable. To remedy this issue, an AC expert will assess your needs and install a more efficient model with more precise temperature settings.

Tripped Circuit Breaker

If there is a power surge in your unit's circuitry, it may trip the circuit breaker. In addition, a short circuit may occur when vermin chew through electrical wires and trigger the breaker. Such an occurrence causes a power disconnect to the AC, making the thermostat screen blank. Thus, you should employ the services of a repair expert to rectify your electrical connection. The expert will also reset the circuit breaker to restore the AC's operation.

Faulty Wire Connection

When you install the thermostat yourself, you may fix the wiring loosely, cutting electricity to the unit. Moreover, if you connect the thermostat to a higher voltage than it can handle, its wiring may burn out. This results in a blank thermostat screen, hampering the system's operation. On the other hand, an air conditioning contractor can install your thermostat and tighten its wiring for peak functionality.

A regularly serviced AC unit will allow effective temperature control. Thus, you should schedule maintenance checks with an AC service expert to ensure your unit delivers optimal performance.

Contact an AC service to learn more.