If you’ve noticed that your AC compressor keeps running even when it shouldn’t, you’re likely concerned. This guide will delve into the reasons for your AC compressor’s continuous running and offer step-by-step instructions to solve the issue.
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Steps to Diagnose AC Compressor Keeps Running
Here are step-by-step instructions to diagnose the issue:
Check the Thermostat
Begin by examining the thermostat settings. Ensure that it is in the ‘Cool’ mode and not set to a temperature too low for the system to reach. If you have an older, non-digital thermostat, it might need calibration.
You can usually find calibration instructions in the user manual. If you suspect that the thermostat is malfunctioning, you may need to replace it.
Inspect Electrical Wiring
First, turn off the electrical power to your AC system for safety reasons. Open the electrical panel of the AC unit to inspect the wiring.
Look for any signs of frayed wires, loose connections, or burnt areas on the circuit board. If you find any such issues, it’s crucial to call an electrician or HVAC professional for repairs.
Consult a Professional for Mechanical Issues
If you’ve ruled out thermostat and electrical issues, the problem likely lies within the mechanical components of the compressor. Due to the complexity and risk involved, it’s advisable to consult an HVAC professional for a thorough inspection and diagnosis. Trying to repair it yourself can void your warranty and may exacerbate the problem.
How to Fix AC Compressor Keeps Running
Once you’ve diagnosed the issue, here are the steps you can take to fix it:
Reset or Replace the Thermostat
If the issue is with the thermostat, a simple reset might resolve the problem. Consult your user manual on how to properly reset it. If the thermostat is outdated or continually malfunctions, replacing it with a new, programmable model is the best long-term solution.
You can check out this Honeywell Home RTH9585WF Wi-Fi Smart Color Thermostat listed on Amazon if it’s suitable for your AC.
Repair Electrical Circuits
If the issue is electrical, do not attempt to fix it yourself. Call a certified electrician or HVAC professional to inspect and repair any electrical components, including wiring and circuit boards.
Replace Damaged Mechanical Parts
If an HVAC technician identifies a faulty capacitor or a damaged relay switch, you’ll need to replace these parts to resolve the issue. The technician can perform the replacement, ensuring that the new components are compatible with your AC system.
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Common Causes of AC Compressor Keeps Running
The main culprits behind an AC compressor that keeps running can be categorized into three groups: Thermostat issues, Electrical problems, and Mechanical issues.
Thermostat Issues
A thermostat is designed to regulate the temperature within your living space by sending on/off signals to your AC compressor. If your thermostat is set too low or is malfunctioning, it can send constant “on” signals. This could be due to an outdated model, incorrect settings, or internal damage such as faulty wiring within the thermostat itself.
Electrical Problems
Any disruptions or issues in the electrical circuit connected to your AC compressor could lead to a scenario where the compressor keeps running. This can include problems like frayed wiring, damaged circuit boards, or issues with the electrical panel. These issues can be a fire hazard and need immediate professional attention.
Mechanical Issues
Mechanical components like capacitors and relay switches play a critical role in the AC compressor’s functioning. A capacitor is responsible for storing and supplying energy to start and run the compressor. Meanwhile, the relay switch controls the on/off cycling of the compressor. If either of these components is damaged or stuck, your compressor may run continuously.