HVAC System Fault Analysis Cases

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

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2001 Dodge Intrepid Cooling System Leak Diagnosis
2001 Dodge Intrepid
The owner reports a very slow leak in the cooling system, specifically around the water outlet with an air bleeder. The leak is causing crusting and d...
Dodge Intrepid cooling system
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Passenger Side Heater Malfunction Diagnosis
1995 BMW 740iL
The vehicle owner reports that there is no heat coming from the passenger side of their 1995 BMW 740iL. They mentioned that all controls for temperatu...
HVAC blend_door temperature_control
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2005 Dodge Ram Running Hot and Rough
2005 Dodge Ram
The owner reports that their 2005 Dodge Ram is running hot and rough. The check engine light is on, and AutoZone diagnosed a misfire on cylinder #5. T...
Dodge Ram overheating misfire
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2008 Dodge Avenger Rear Indicator Bulb Replacement
2008 Dodge Avenger
The vehicle owner is trying to replace the rear indicator bulb on their 2008 Dodge Avenger. They have removed two plastic wing nuts found in the trunk...
Dodge Avenger rear indicator
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2005 Chevy Trailblazer Blower Motor Cuts Out At Max Setting
2005 Chevrolet Trailblazer
The owner reports that after replacing the blower motor resistor and its connector, the blower motor now cuts out at the maximum setting (5). Initiall...
blower motor HVAC system relay issues
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2007 Chevy HHR Turn Signal Lever Replacement
2007 Chevrolet HHR
The owner of a 2007 Chevy HHR has snapped off the plastic turn signal lever about an inch from the end, leaving it connected only by internal wiring. ...
turn signal lever multifunction switch steering column
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1986 Ford Bronco Coolant Leak Diagnosis
1986 Ford Bronco
The owner reports that their 1986 Ford Bronco, which has over 210,000 miles and is still running smoothly, is leaking coolant. They have maintained th...
coolant leak Ford Bronco 1986 model
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Head Gasket Replacement with Radiator - Fact or Fiction?
2000 Mazda 626
The vehicle owner reports that the radiator on their 2000 Mazda 626 needs replacement. The repair facility insists on replacing the head gaskets simul...
Mazda 626 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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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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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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