HVAC System Fault Analysis Cases

Detailed HVAC system diagnostics including air conditioning failures, heating system problems, and ventilation issues.

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Transmission Power Loss on Inclines
1999 Nissan Bluebird Eprise
The owner reports that the 1999 Nissan Bluebird Eprise drives well on flat surfaces but struggles to climb hills. Pressing the accelerator does not yi...
Nissan Bluebird transmission
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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 ...
Jeep Cherokee Heater System
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1989 Toyota Corolla Cooling Fan Constantly On
1989 Toyota Corolla
The owner reports that the cooling fan is running constantly from the moment the engine starts, even when cold. Additionally, a check engine light has...
Cooling System Coolant Temperature Sensor Fan Relay
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Blower Motor Not Working Diagnosis
1995 Cadillac El Dorado
The owner of a 1995 Cadillac El Dorado with a V8 engine reports that the front blower motor is not functioning. They have attempted to replace the blo...
blower motor Cadillac El Dorado HVAC system
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Diagnosing Coolant Leak in 1998 Chevy S-10
1998 Chevrolet S-10
The owner of a 1998 Chevy S-10 reports a significant coolant leak that has worsened over the past week. The leak originates from the middle of the eng...
coolant_leak Chevy_S10 diagnosis
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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...
Toyota Corolla Coolant System
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HVAC System Fogging Issue After Cooling System Repair
1996 Saturn SL2
The owner of a 1996 Saturn SL2 experienced a fogging issue on the windows after replacing the leaking radiator, thermostat, temp sensor, water pump, a...
HVAC fogging cooling_system
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1995 Isuzu Rodeo Blower Motor Diagnosis
1995 Isuzu Rodeo
The owner reports that the blower motor for the air conditioning system in their 1995 Isuzu Rodeo is not functioning. They have tested the circuit and...
Isuzu Rodeo blower motor
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2001 Audi A6 Auxiliary and Condenser Fans Inoperative
2001 Audi A6
The owner reports that both the auxiliary and condenser fans stopped working four days after the auxiliary fan was replaced. They have replaced the En...
Audi Cooling System Fan Operation
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2001 Honda Accord Cooling Fan and AC Issues
2001 Honda Accord
The owner reports that both the radiator cooling fan and the AC fan are constantly running, even when the engine is not hot. The AC compressor seems t...
Honda AC System Cooling Fans
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1996 Ford Escort Electric Fan Not Working
1996 Ford Escort
The owner reports that the electric cooling fan on their 1996 Ford Escort LX 1.9L is not functioning, leading to engine overheating issues. Previous r...
Ford Escort Cooling System
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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...
Pontiac Grand Am overheating
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1998 Cadillac Deville Cooling System Water Loss
1998 Cadillac Deville
The owner reports that their 1998 Cadillac DeVille is losing coolant, needing frequent top-ups. They recently replaced the radiator cap but the issue ...
Cadillac cooling system water loss
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1998 Chevy Suburban Rear Brakes Burning
1998 Chevrolet Suburban
The owner reports that the rear brakes of their 1998 Chevy Suburban keep burning and warping, leading to frequent replacements. In the past year alone...
brake_system overheating warping
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1995 Lincoln Town Car Fan Speed Diagnostic
1995 Lincoln Town Car
The owner reports that the fan speed in their 1995 Lincoln Town Car only operates at high speed, regardless of the automatic temperature control or ma...
Lincoln Town Car fan speed
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1985 Chevrolet Vacuum System Diagnosis
1985 Chevrolet Other Models
The owner is experiencing engine performance issues with their 1985 Chevrolet truck equipped with a 5.7L 350 V8 engine. The vehicle starts but runs po...
vacuum_system EGR PCV
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1996 Buick Riviera Coolant Leak Diagnosis
1996 Buick Riviera
The owner reports a coolant leak from the underside of their 1996 Buick Riviera, specifically near the crossmember on the right side. Upon inspection ...
Buick Riviera coolant leak
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2003 BMW Z4 Water Pump Replacement Diagnosis
2003 BMW Z4
The owner of a 2003 BMW Z4 is experiencing engine cooling issues, specifically related to the water pump. They have previously removed the entire cool...
BMW Z4 water pump
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