What Is An HVAC Compressor?
Compressors are a crucial part of any air conditioning system. Its main function is to help evacuate heat from the house by compressing refrigerant fluid. By compressing the refrigerant, it heats up further, converting it from a gaseous state into a liquid. The temperature of the refrigerant always stays higher than its surrounding environment. Heat naturally transfers from warm to cooler areas.
For the refrigerant to evacuate heat efficiently, the AC system requires the compressor to be well-maintained and in excellent working condition at all times. However, in many cases, when the AC is not working, the primary cause of the fault usually traces back to the HVAC compressor.
With the summer heat getting more intense with each passing year, the worst thing you can experience is a malfunctioning HVAC compressor and, therefore, a faulty AC. A working AC will condition your indoor air into cool air rather than experiencing the warm dry air of a typical summer night.
Naturally, when a machine like an HVAC runs constantly, a fault occurs in the compressor. You might notice the fan running but the compressor not working. However, it’s not all doom and gloom. Here’s an insight into what could be the problem with your HVAC.
Fan Is Running But AC Compressor Is Not Working: What’s The cause?
When you switch on the air conditioner, you may see that the fan is operating even when the compressor is not. The problem is usually easy enough for a do-it-yourself quick fix, although an HVAC specialist may be required in some cases.
1. Dirty Coil & Filters
Evaporators, filters, and condenser coil can become clogged with debris and dirt, causing the entire unit to shut down. A clogged air filter lowers airflow to the point of causing the evaporator coil to malfunction.
The compressor is put under strain by clogged air purifiers and condenser coils, causing it to overheat. In the best-case situation, the compressor auto-shuts down before it is harmed. Otherwise, the compressor may need to be replaced due to the constant overheating.
Replace the dirty air filters, clean the condenser coils, and make sure there are no blockages in the vents so that air may flow freely.
2. Starter & Capacitor Relay Problems
The capacitors and relays are critical components in the compressor’s power supply. They are another common source of compressor issues. The blower motor, the compressor, and the outer fan all require power to start and run, and the capacitor provides that. The compressor receives electricity from the capacitors via the starter relay.
If your air conditioner compressor isn’t operating but you hear humming from the unit, the compressor might be trying to reach a faulty or non-functioning capacitor. On the plus side, these are the simplest and least expensive parts to replace.
3. Dead Compressor
This can be caused by something as simple as an overheating AC or a defective capacitor. With a dead compressor, the only choice is to replace it. Ensure your compressor replacement is done by an experienced professional with ample man-hours in changing compressors.
If the AC compressor isn’t operating but the fan is, it’s likely that the compressor’s outer unit isn’t receiving power. The fan continues to run since the central unit is unaffected. Check the wiring between the two units if the compressor won’t start. The hunt is over if it’s a blown fuse or a tripped circuit breaker.
A mismatch of outdoor and outdoor units, malfunctioning thermostats, or an aging air conditioner are all possible culprits.
Is The Compressor Malfunctioning, But Fan is Running?
If your air conditioner’s compressor fails, you may find yourself the experiencing the following situations:
- i. Warm, dry air venting from the running fan,
- ii. The compressor stops working completely,
- iii. The circuit breaker trips a lot,
- iv. Shaking and strange noises emanating from the outdoor unit, and
You Should Fix The AC Compressor That’s Not Working, But Fan is Running.
The compressor is the heart and soul of the air conditioner. A skilled and experienced AC technician is best placed to determine if the compressor should be replaced or repaired. Before the utility bill starts to pile up, a pro in the sector can solve it.
My AC Compressor Isn’t Working But My Fan Is: Prevention Tips
Maintaining the AC unit is the best and most effective preventative approach because it resolves the majority of problems before they become more serious. The compressor is composed of numerous easily replaceable parts. Regular inspections allow the part to fail early enough to be replaced, essentially eliminating the danger of an AC compressor failure.
An AC compressor that isn’t working might be a source of worry and discomfort. If you spot a fault with the compressor section of the unit, the best course of action is to contact a professional HVAC technician.