HVAC System Fault Analysis Cases
Detailed HVAC system diagnostics including air conditioning failures, heating system problems, and ventilation issues.
Browse by Specific Problem
Leaking Head Gasket and Overheating Diagnosis
1998 Subaru Legacy
The owner of a 1998 Subaru Legacy wagon reports overheating and gradual coolant loss. A local repair shop has quoted $2500 for head gasket replacement...
View Analysis →
1999 Oldsmobile Cutlass Overheating Issue Analysis
1999 Oldsmobile Cutlass
The owner recently acquired a 1999 Oldsmobile Cutlass and has been working on it with a neighbor. After changing the battery, they noticed the engine ...
View Analysis →
2001 Jeep Cherokee Heater Issues
2001 Jeep Cherokee
The owner of a 2001 Jeep Cherokee reports that the heater only blows cold air despite checking the blend doors, which are functioning correctly. They ...
View Analysis →
Saturn Outlook Overheating After PCM Replacement
2007-2010 Saturn Outlook
The owner experienced overheating issues after taking the Saturn Outlook to the dealership for a transmission shifting problem. The service technician...
View Analysis →
Blower Resistor Location and Diagnostic Insights
2000 Saturn LW1
The vehicle owner is experiencing issues with the blower motor not functioning properly. They have sought guidance on the location of the blower resis...
View Analysis →
2001 Pontiac Grand Am Overheating and Fan Issues
2001 Pontiac Grand Am
The owner reports that their 2001 Pontiac Grand Am is overheating, and the engine fans are not operational. They've recently changed the oil and added...
View Analysis →
1991 Buick Park Avenue Cooling Fan Diagnostics
1991 Buick Park Avenue
The owner reports that the cooling fan for the radiator is not operating correctly, leading to overheating issues during driving, especially when the ...
View Analysis →
2005 Honda Accord Accelerating Vibration Diagnosis
2005 Honda Accord
The owner of a 2005 Honda Accord reports experiencing significant shaking in the steering wheel when accelerating, particularly noticeable at around 6...
View Analysis →
1999 Ford Escort Heater System Diagnosis
1999 Ford Escort
The owner of a 1999 Ford Escort reports that while all systems related to the heat function are operational, the vehicle does not blow hot air. They n...
View Analysis →
1995 Mazda MPV Only Blowing Warm Air
1995 Mazda MPV
The owner reports that the 1995 Mazda MPV is only blowing warm air from the heater and begins to overheat after about 30 minutes of operation. The veh...
View Analysis →
Heater Hose Repair for 2000 Ford Windstar 3.8L
2000 Ford Windstar
The owner reported a heater core hose on their 2000 Ford Windstar 3.8L snapped off at the intake manifold. The hose connects to a 'T' behind the engin...
View Analysis →
2003 Pontiac Montana Transmission and Heater Issues
2003 Pontiac Montana
The owner reports intermittent issues with the transmission and heater in their 2003 Pontiac Montana. They experience a loss of acceleration when atte...
View Analysis →
Diagnosing Vacuum Leak in 2006 Ford Focus 2.0L
2006 Ford Focus
The owner of a 2006 Ford Focus 2.0L reports that the engine light is on. The vehicle runs roughly at idle and dies, but restarts immediately. A source...
View Analysis →
1998 Toyota Corolla Cooling System Diagnosis
1998 Toyota Corolla
The owner reports that their 1998 Toyota Corolla is running hot during low-speed situations. They have already replaced the left side cooling fan moto...
View Analysis →
1990 Cadillac Brougham Heater Not Working
1990 Cadillac Brougham
The heater in my 1990 Cadillac Brougham with a 5.0-liter engine has stopped working. Initially, I checked the heater control valve for operation. I fo...
View Analysis →
1997 Cadillac Deville HVAC Front Vent Issue
1997 Cadillac Deville
The owner reports no air is coming out of the front dash vents in their 1997 Cadillac Deville. They replaced the air flow actuator located under the g...
View Analysis →
Repeated Radiator Failures in 2005 Toyota Camry
2005 Toyota Camry
The owner has experienced overheating issues shortly after having a new radiator installed in their 2005 Toyota Camry. The previous radiator was repla...
View Analysis →
2000 Ford Escort Thermostat and A/C Issues Diagnosis
2000 Ford Escort
The owner reported that the air conditioning is not working effectively, especially when the outside temperature rises. They mentioned that the thermo...
View Analysis →
Page 6 of 9 - Showing automotive fault analysis cases