just getting cold air. help.
2007-01-16 07:29:07 · 3 answers · asked by cathy b 1 in Cars & Transportation ➔ Car Makes ➔ GMC
Most common problem would be that the thermostat is stuck open which is not allowing the engine coolant to get hot enough to heat inside. If your temperature guage in the instrument panel shows colder then normal the thermostat is the problem. Another possiblity may be that the heater cable is seized or broken. If you are unsure it would be more cost effective to have a technician diagnose the problem instead of replacing parts which may not fix your problem.
2007-01-16 07:44:04 · answer #1 · answered by Brian 2 · 0⤊ 0⤋
Need more info in the first place. You have to determine if the motor is reaching operating temperature, as this will determine if you have a thermostat or a low cooling system causing this problem. If the motor heats to normal operating temp., 200F or thereabouts, and both the heater hoses feel hot to the touch, you have a control problem with the HVAC. This will need some removal of internal components to test and diagnose. Nothing comes to mind as far as a recurring problem I ever encountered. Things like stuck doors and broken hardware inside the HVAC system were few and far between. Make sure you don't have a vacuum leak at the motor area as a lot of these systems were run on vacuum. Dig in and have a look. Good luck.
2007-01-17 22:33:45 · answer #2 · answered by Deano 7 · 0⤊ 0⤋
have the thermosat relpaced, check coolant level
2007-01-19 13:18:05 · answer #3 · answered by peterosefan1414 3 · 0⤊ 0⤋