HVAC System Fault Analysis Cases

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

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2004 Ford Freestar Overheating and Air Pocket Issues
2004 Ford Freestar
The owner of a 2004 Ford Freestar reports overheating issues after replacing the thermostat and flushing the radiator. The vehicle only runs for 2-3 m...
Ford Freestar overheating
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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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2002 Ford Taurus V6 Air/Heater Surge Issue
2002 Ford Taurus
The owner reports that the 2002 Ford Taurus V6 runs well until the air conditioning or heater is turned on, causing the engine to surge while at a sto...
Ford Taurus V6
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2008 Ford Fusion A/C Fan Noise Diagnosis
2006-2009 Ford Fusion
The owner reports a persistent noise under the dashboard of their 2008 Ford Fusion, which they suspect is related to the A/C or ventilation fan. The n...
HVAC Noise Diagnosis Blower Motor
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1996 Jeep Cherokee Violent Shimmy at 55 MPH
1996 Jeep Cherokee
The owner reports that their 1996 Jeep Cherokee experiences a violent shimmy or shake at speeds around 55 mph. This issue began approximately three mo...
shimmy track bar suspension
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1993 Cadillac El Dorado Cooling Fans and Blower Issues
1993 Cadillac El Dorado
The owner reports that the cooling fans and blower motor are not functioning under their own power. The driver seat also fails to operate independentl...
Cadillac El Dorado Cooling System
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1993 Pontiac Grand Am Heater Not Blowing Air
1993 Pontiac Grand Am
The owner reports that the heater in their 1993 Pontiac Grand Am is not blowing air, despite the blower motor functioning properly. They have already ...
Pontiac Grand Am HVAC
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Chevy SSR Throttle Body Replacement Issues
2006 Chevy SSR
The owner replaced the throttle body and gasket on a 2006 Chevy SSR, restoring performance initially. However, the vehicle failed to start later on a ...
Chevy SSR throttle body
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1997 Pontiac Trans Am Heater Issue Diagnosis
1997 Pontiac Trans Am
The owner reports that the 1997 Pontiac Trans Am is not producing adequate heat. After replacing the thermostat and filling the coolant, the vehicle w...
heating_system thermostat blend_door
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1995 Pontiac Grand Prix Overheating Issue Diagnosis
1995 Pontiac Grand Prix
The owner reports that their 1995 Pontiac Grand Prix SE, which has a replacement engine with 60,000 miles, overheats after driving for 30-45 minutes. ...
Pontiac overheating cooling_system
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Heater Only Works on High Speed - Diagnostic Analysis
1999 Chevrolet Prizm
The heater in the 1999 Chevy Prizm only works when set to the high speed position, leading the owner to suspect issues with the blower motor, blower r...
Chevrolet HVAC blower motor
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1976 Jaguar Sovereign Ball Joint Replacement Issue
1976 Jaguar Sovereign
The owner of a 1976 Jaguar Sovereign is facing difficulties with a stuck tapered fit ball joint. They inquired about using a ball joint splitter and m...
Jaguar Suspension Ball Joint
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