If the pressure builds up too high, an explosion can occur in the system. The high pressure switch monitors any blockages in the system that would lead to more pressure on the high pressure side. When the AC compressor pumps out refrigerant without the correct pressure, it can cause significant damage to the compressor, leading to higher repair costs. The low pressure switch ensures that the pressure never drops too low. One monitors the high-pressure side, while the other evaluates the low-pressure side. It is responsible for monitoring the refrigerant pressure on both the low and high-pressure sides of the AC compressor. The function of the AC pressure switch is to provide safety monitoring over the AC system. RELATED: Does AC Stop Leak Sealer Work? (& Is it Bad?) AC Pressure Switch Function
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A look in your service manual will show you the appropriate location for your model. Most AC pressure switches are found within the engine compartment, but some manufacturers put them elsewhere. The low pressure side switch is located before the AC compressor, while the high pressure switch comes after the compressor. You will find the low pressure AC switch on the low pressure side (smaller pipe) and the other on the high pressure side (large pipe). The AC pressure switches are located on the AC pipes on both sides of the AC compressor. RELATED: 6 Symptoms of a Bad AC Compressor AC Pressure Switch Location Listen for the distinct clicking noises from both under your car’s dashboard and in the engine compartment, telling you that the switch is turning the compressor off and on. It will sound like the clicking occurring when the compressor normally activates, except the air won’t work. If the compressor is clicking off and on, you are going to notice some strange sounds from the engine and under your dashboard. However, this problem is also caused by low refrigerant levels, which should be checked regularly. However, when the AC pressure switch goes bad, warm air might be all you get. When you turn on the air conditioning, you expect to feel cold air pour out. However, many components make up the air conditioning system, so your problem could be entirely different.
What’s worse than the air conditioning working intermittently? How about when it stops working at all? If your AC doesn’t run, the refrigerant pressure switch sensor might be defective. RELATED: 9 Causes Why Your Car AC is Not Blowing Cold Air 2. To become comfortable again, you will need to have the switch replaced. Or, it might only work occasionally, leaving you hot most of the time.Įither way, when the air conditioning only offers intermittent usage, it’s a good sign that the AC pressure switch is faulty. You might notice that the system starts up and cuts out for a short time. This AC system symptom can show up in numerous ways.
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