We received a lot of email query about a 1998 blazer hot air blowing air conditioning system, so instead of answering the email one by one we decided to discuss the problem.
Troubleshooting 1998 blazer hot air blowing AC
If the problem is suddenly occur this indicates a major refrigerant leak. The refrigerant for car air conditioning is a major component of the system that serves as the life blood of the system. It is the one that carries heat coming from the passenger compartment and dump the heat outside the car to make the passenger compartment cooler.
When there is a rapid leak anywhere in the system the air conditioning performance will reduce and start to blow hot air instead of cool air. Also it is possible that the wires of the ac system is shorted causing the fuse to pop out. Another possible cause but not commonly occur is the problem on compressor, usually a broken or slipping belt that drive the compressor is the problem or the compressor clutch is not engaging.
Cause of the problem: Major refrigerant leak, shorted wire or ac switch, broken or slipping compressor belt, compressor clutch not engaging.
Free car diagnostic recommendation
Check first the ac system, open the hood and observed if there is a broken or ruptured ac hose. Then check the compressor belt if it is broken or slipping, when the belt is slipping a sound can be heard. When everything looks fine the next thing to check is the circuit breaker, you may find the circuit breaker by referring to the vehicle owner’s manual. Reset the breaker to fix the problem, but it may pops out again so it is better to bring the car to a shop specialize in air conditioning system and ask the expert to check the electrical system then repair if necessary.