QuestionI have a 02 Cavalier first the ac was that went out but it would still blow air out the vents. now the heater stop working not only that no air is coming out the vents any more.my car at a stand still in drive the rpm, start to surge and the car has even died out but started right back up.Im sure these are all linked together but not sure if you please give me some advice as to what this could be thank you
AnswerWe are a UK company so have no specialised knowledge of your vehicle however.
If the heating and a/c were isolated, try the following
Has the system got gas, without it the a/c high pressure switch won't activate and send 12 volts to the compressor.
The blower fan is controlled by a rheostat. Typically this will regulate the fan speed by adding 3-6-9- and then 12 volts to the speed as you turn the blower control
If the rheostat is at fault then it should work on maximum blower as it by-passes the rheostat
If there is no action at all disconnect the power to the fan and connect up a 12 volt battery supply. We would use a Power Probe for this but any 12 volt lead will do it.
If nothing happens then your fan motor has gone.
These two tests will eliminate the a/c and heating from the problem.
It does sound a little more serious than that. A main dealer diagnostic may help further.
It sounds like some kind of management issue that would show up on a diagnostic, wet electrics for example can throw everything out.
Sorry we can't be of more help
Thank you for your enquiry
