When the AC pressure switch malfunctions, it can cause the compressor to run continuously. Excessive pressure in the system can cause unusual noises, such as loud humming or clicking sounds from the compressor. It’s crucial to address this issue, particularly in hot weather. Some symptoms are easier to diagnose than others, and there are AC system fault codes that can help identify the problem.
However, when the compressor fails, it can be challenging to determine. Well, in this article, I’ll be discussing the bad AC pressure switch‘s diagnosis, how to tell if the switch is bad, etc. Continue to read so you learn more. Well, let’s get started!
Contents
Bad AC Pressure Switch
If your car’s AC pressure switch is broken, the AC system may not work properly. Signs of a malfunctioning AC pressure switch include the AC cycling on and off, failure to cool the cabin, or the compressor not turning on. You can find garages in Reading and book an appointment with a mechanic to replace the AC pressure switch, which is designed to protect the compressor.
Function Of AC Pressure Switch
The AC pressure switch controls the system based on pressure changes. Malfunctioning can cause the system to stay on or off when it should be doing the opposite, leading to heat buildup and blowing warm air into the room.
Read More: Symptoms Of A Bad AC Pressure Switch
How To Diagnosed A Bad AC Pressure Switch
To troubleshoot the air conditioning system:
- Turn on the air conditioning with the engine running and windows open to prevent cycling issues.
- Check for a bad air conditioning pressure switch by feeling the condenser tubes for coldness. If one tube is not cold, there may be a refrigerant flow issue.
- Use an air conditioning gauge set to check pressure levels on both the low and high sides. The readings should be around 30 PSI on the low side and twice the ambient temperature plus 50 PSI on the high side.
- Scan for trouble codes using an OBDII port and a code scanner to identify any issues with the system.
- Test the electrical connections, including the pressure sensor, by using a multi meter to ensure it reads between 4.0 and 5.0 volts when connected.
How To Tell If AC Pressure Switch Is Bad
The most common signs of a faulty AC pressure switch include the air conditioning compressor not turning on, rapid on and off cycling of the compressor, warm air blowing from the AC system, and high or low-pressure readings. A faulty AC pressure switch can cause inefficiencies and increase wear and tear on the compressor. It is important to schedule an AC repair immediately if you notice any of these signs.
Where Is The AC Pressure Switch Located
The AC contains various elements, including the pressure switch for safety. There are pressure switches on both the low and high sides of the AC unit. The high-pressure side switch is located after the compressor, while the low-pressure side switch is located before it. Most pressure switches are located in the engine compartment, but some manufacturers may place them elsewhere.
Read more: Symptoms Of a Bad AC Compressor
Bad AC Low Pressure Switch Symptoms
- Air Conditioner Blows Warm Air. The AC pressure switch is responsible for turning the system on and off in response to changes in pressure.
- Strange Noises. When the AC pressure switch malfunctions, it can cause the compressor to run continuously.
- AC System Turns Off Unexpectedly.
How To Test A Bad AC Pressure Switch
There are several ways to tell if your AC low-pressure switch is bad. One way is to check the pressure on the switch. If the pressure is outside of the ideal range, it could mean that the switch is bad and needs to be replaced. The compressor’s task is to ensure that the refrigerant flows via the AC unit.
AC Pressure Switch Replacement Cost
The cost to replace an AC pressure switch is typically between $150 and $400, including labor and parts. Factors such as DIY or professional help can affect the final bill. This guide provides insight to help make an informed decision on AC pressure switch replacement costs.
Conclusion
The AC pressure switch plays a crucial role in the functionality of your air conditioning unit. If it malfunctions, it could lead to costly repair expenses, making it essential to address any issues promptly.
Well this it for this on this article where we discussed about Bad AC Pressure Switch. Hope it was helpful if so kindly share it with other.
Leave a Reply