What causes HVAC to stop working?

HVAC stops working and fails to turn on means one is experiencing electrical problems. You can find underlying issues that may need a serious look. Check the working outlet and investigate the main and secondary circuit panels. Check for a tripped breaker or a blown fuse. Also, check for loose wires, thermostat issues, a dirty fuse, or a bad capacitor. Consider HVAC maintenance to avoid causing problems and from stopping work.

Here are a few causes of HVAC that stops working:

Malfunctioning Thermostat

HVAC not working means it may be due to the thermostat. The thermostat issues cause fluctuating temperatures. It regulates the hot and cold air production and the system timing. It may also let the AC run even on reaching the required temperature set. The thermostatic expansion valve may be a problem or the sensor may be loose.

Clogged Condenser Unit

The HVAC systems condenser unit can be in a separate mechanical room or outside. An outside unit is prone to accumulate debris and to get blocked. These obstructions hinder airflow enveloping the unit; thereby it dramatically affects the unit’s efficiency. It causes the system to overheat as the condenser works harder to get the best results.

Faulty Heat Pumps

The thermostat in extreme cold conditions has low-temperature settings causing ice up. There is decrease in performance as ice causes within the pumps. The indoor coils are iced-up and it causes to sweat the ductwork and it damages the ceiling or the walls.

Refrigerant Liquid Leakage

Leaking refrigerant liquid from HVAC systems is a big issue and it happens with the vibrations with system operating. It results in stopping the HVAC from working. The system cools much if there is leakage of the Refrigerant liquid. It causes the evaporator coil to freeze as the temperature drops. The refrigerant liquid for a HVAC system is the blood. The compressor overheats as the liquid runs low and it stops the HVAC from working. Low refrigerant levels are a sign that gives sticky feel in the air and i9t is because humidity and heat remains in the air.

Cracked or Frozen Evaporator Coils

Evaporator coils freeze due to blocked return air grilles, low refrigerant levels, and clogged filters limiting the airflow within the coils. The temperature drops if it lacks airflow and the evaporator coils as temperature falls below the point and freeze up.

Natural Wear and Tear

Proper usage and regular HVAC maintenance ensure you get the best out of the HVAC unit. However, it does not avert the natural wear and tear of the inside mechanical parts that are prone to damage with routine wear and tear.