As an electronic device, the AC sometimes gives you some problems. One of them is a stuck relay in your air conditioner. You need to know how to fix a stuck relay on the AC unit. Why do you have to know it? Because this problem will affect your AC’s functions and make them unable to perform well.
How to Fix a Stuck Relay on AC Unit Step by Step
This guide is your solution to fixing a stuck relay on an AC unit, particularly for systems with an AC fan or compressor that won’t turn on.
A stuck relay problem on an AC unit is very common. As someone who has dealt with this issue firsthand, I found that cleaning the relay switch is a crucial first step. Dust, dirt, and debris are common culprits causing the relay to stick.
Read also: Bad AC Compressor Symptoms Noise
Carefully removing the cover and cleaning the relay with a soft brush or air can often resolve the issue temporarily. If that doesn’t work, lightly tapping the relay might help. However, if the relay remains stuck, replacement may be necessary.
But please note that there are conditions that those solutions can’t fix. There is no option; you have to replace the stuck relay. Here are the easy steps on how to fix a stuck relay on an air conditioner unit:
- Choose the Right Relay
First, you need to buy the right relay for replacement. Please check carefully to see if the relay was matched. Make sure all of the aspects match well. Start with the shape, design, and, of course, the electrical specification.
- Turn Off the Power
Before you replace the relay in the AC unit, you have to turn off the power. Also, you can disconnect the switch if you need to. If you don’t disconnect the power, it will harm you because relays are a component that will transfer electricity.
- Watch the Terminal ID
You need to find out which one is the terminal ID. Keep track of that terminal ID, making it easier to replace the relay. You will see some wires there. Please tape all of them to make it easier. The next step is to draw the relay with the terminals. Please make sure it’s suitable for the wiring.
- Remove the Old Relay and Replace It
This is the main part when you want to replace the relay. Unscrew the old relay first, then you can install the new one. Please use a screwdriver to install the new relay and ensure it’s strong enough.
- Final Step
This is the final step in replacing the relay. Please push the wire into the terminals, making sure you push it based on the ID numbers. Prepare pliers to push the wires together gently. In the end, check it again and ensure you have replaced the relay well.
How to Tell if AC Relay Switch is Bad
AC relay switch costs can vary depending on whether you use expert installation services or do it yourself. Now it’s time for you to know when the right time is to replace the relay. You must know all the signals that indicate your relay switch is bad. Here are some indications to tell if the AC relay is not in good condition:
- An air conditioner can’t give a consistent cooling function. A relay is used to transmit the command to the thermostat. The thermostat can’t complete the request if the relay fails.
- A stuck relay on an AC unit will make your AC unturnable. The relay will stick or stay in the open state when it is in bad condition. It will cause your AC’s components not to turn off.
- In the other condition, your AC can’t be turned on when the relay is stuck. If something is wrong with the relay, the compressor won’t get enough power to work, which is why a stuck relay will cause your AC to break.
A malfunctioning relay can disrupt the entire AC system, causing the AC to not turn on and affecting the unit’s ability to cool your home effectively.
Personal experience has taught me that correctly identifying the terminal ID is crucial when working with relays. Misidentifying terminals can lead to improper wiring, which not only damages the relay but could also affect other components of your AC. I recommend taking photos or labeling wires before disconnecting anything.
| Aspect | DIY Replacement | Professional Replacement |
|---|---|---|
| Cost | Lower cost, only for the relay and basic tools | Higher cost, includes service charges and professional fees |
| Skill Level Required | Higher cost, including service charges and professional fees | None, handled by experts |
| Risk Level | Higher risk of incorrect wiring or electrical shock | Low, handled by trained professionals |
| Time Required | Longer, especially if unfamiliar with AC systems | Quicker, usually completed within an hour |
| Reliability | Varies depending on skill and knowledge | High, with a warranty on work performed |
Regular maintenance of your air conditioning systems is crucial for optimal performance. If you experience issues where your AC fan or AC compressor is not functioning as expected, checking the relay should be a priority. Remember, a well-maintained AC unit ensures a comfortable environment and helps reduce energy bills.
