Buick LeSabre Air Conditioning Refrigerant Pressure Switch Replacement Cost

Know what price you should pay to get your vehicle fixed.

The average cost for a Buick LeSabre air conditioning refrigerant pressure switch replacement is between $86 and $107. Labor costs are estimated between $31 and $41 while parts are priced between $55 and $66. Estimate does not include taxes and fees.
Note about price: The cost of this service or repair can vary by location, your vehicle's make and model, and even your engine type. Related repairs may also be needed. Talk with a RepairPal Certified shop to learn which repairs might be right for you.

How does an Air Conditioning Refrigerant Pressure Switch work?

The air conditioning refrigerant pressure switch monitors the pressure cycling through the AC system. Refrigerant in the system is, at some points, under low pressure, and, at others, under high pressure. This essentially creates two "sides" to the system: the low side, and the high side. Generally, there are two pressure switches. A low pressure switch disengages the compressor clutch when the pressure is too low on the suction side (low side) of the AC system in order to protect the compressor from damage. A high pressure switch does the same thing if pressure builds too high on the discharge side (high side) of the system. It may also control the AC condensor fan. Some vehicles have only one switch.

What are the symptoms of a bad Air Conditioning Refrigerant Pressure Switch?

If the air conditioner is turning on and off frequently, or not turning on at all, the air conditioning refrigerant pressure switch might be faulty. Even a system that is unable to cool the vehicle properly can be a sign that the pressure switch has failed. The pressure switch is tasked with cutting off power to the AC compressor if the pressure in the system is either too low (on the "low side") or too high (on the "high side"). An AC system that cycles on and off is normal. Just as a household air conditioner turns on and off as needed to maintain a consistent temperature, the AC system in a vehicle will turn on when the temperature in the passenger compartment rises, and turn off when it is cool. But constant and frequent cycling of the AC compressor is not normal, and may be due to a faulty pressure switch. And if the switch is not working at all, the compressor may not turn on at all. The high and low refrigerant pressures in the AC system are key to the operation of the system. If the pressures are too high or too low because a pressure switch is faulty, the system may have a difficult time cooling the vehicle.

Can I drive with a bad Air Conditioning Refrigerant Pressure Switch?

A faulty air conditioning refrigerant pressure switch will prevent the air conditioner from operating properly. While a vehicle can certainly be driven without air conditioning, damage to the AC compressor is possible if the switch is bad and the system is used for extended periods of time.

How often do Air Conditioning Refrigerant Pressure Switches need replacement?

The more the air conditioner is used - especially if it is turned on and off frequently - the shorter the lifespan of the pressure switch. Under normal operating conditions, the pressure switch should last the lifetime of the vehicle.

How are Air Conditioning Refrigerant Pressure Switches replaced?

Once a technician has located and diagnosed a faulty pressure switch, replacement is usually straightforward.The electrical plug is disconnected from the end of the switch and the switch is unscrewed from its mount. It is common for the mount to employ a self-closing valve that prevents refrigerant from escaping when the pressure switch is removed. In most cases the refrigerant does not need to be removed (evacuated) from the system. however, it is necessary to have access to vehicle-specific technical information to ensure this is the case.

RepairPal Recommendations for Air Conditioning Refrigerant Pressure Switch issues

It is recommended that diagnosis and service to the air conditioning system be left to a professional who has access to specific information relative to the vehicle, and who can perform a comprehensive test of the system to accurately identify the source of the problem. The air conditioning systems on various vehicle makes and models will differ in design. Also, accidental discharge of refrigerant can be quite messy - and it is not lawful for refrigerant to be vented into the atmosphere. Special equipment is used for evacuation , vacuum, and recharging of the air conditioning system., should these operations be necessary.

What to look out for when dealing with Air Conditioning Refrigerant Pressure Switch issues

Prolonged use of the air conditioning system with a faulty pressure switch - one that works intermittently - can lead to significant stress on the AC compressor and a significantly higher repair bill. The air conditioning system should be periodically inspected by a repair professional.

Can I replace the Air Conditioning Refrigerant Pressure Switch myself?

A common problem with DIY repairs of the air conditioning system include over-charging or undercharging with too much or too little refrigerant. An understanding of the relationship between temperature, pressure, refrigerant volume and weight is important for accurate charging of the system. Special gauges are also required. Although it is a fairly straightforward procedure to replace a pressure switch on most vehicles, because improper charging (pressure too high or too low in system) can mimic problems with the pressure switch, diagnosis and repair should be left to a professional.