A/C COOLING Problem?

By far the most very likely reason for an automotive air conditioner cooling problem is no refrigerant within the system. If the refrigerant has escaped past a leaky compressor or O-ring seal, leaked out of a pinhole during the evaporator or condenser, or seeped out by way of a leaky hose, the leak wants to be identified and repaired right before the system is recharged.

On a lot of programs, the compressor is not going to turn on in case the refrigerant is lower since the “low strain safety switch” prevents the compressor clutch from engaging if system strain is lower. This protects the compressor from potential harm triggered by a lack of lubrication.

One with the very first things you ought to verify, therefore, is compressor engagement. In case the compressors magnetic clutch will not be engaging when the A/C is turned on, the issue could be a blown fuse or perhaps a wiring problem. If the fuse is blown, replacing it could restore cooling temporarily. However the underlying cause for your fuse blowing to start with demands to become recognized and corrected to stop the exact same thing from taking place yet again.

If the magnetic clutch is getting voltage but will not be engaging the compressor, the clutch is defective and desires to be replaced. If there exists any proof of leakage across the compressor shaft seal, the seal need to also be replaced.

Should the clutch works but fails to turn the compressor (the belt may squeal in protest!), the compressor has seized and requirements to become replaced.

Compressor failures are often the outcome of reduction of lubrication, which in turn could be resulting from very low refrigerant within the system, a blockage (such like a plugged orifice tube which prevents refrigerant and oil from circulating for the compressor), loss of lubricant resulting from leaks or improper services procedures (not including oil to the system to compensate for oil lost through leakage or element replacement), or usage of the wrong sort of lubricant.

R-12 systems need mineral oil although R-134a systems demand different forms of PAG oil or POE oil. Applying mineral oil within a newer R-134a system can cause critical lubrication troubles as can using the incorrect grade (viscosity) of PAG oil. Constantly stick to the automobile or lubricant companies compressor oil suggestions.

The next point you should verify when troubleshooting a no cooling difficulty is system pressure. For this, you may need a set of A/C service gauges. Attach your services gauges on the substantial and very low service fittings. If both the high and low side pressure gauges read low, the system is lower and demands recharging. But before any refrigerant is added, check out for leaks to find out the place the refrigerant is going.