Heater blowing cold air (Digital Climate Control) - Third Generation F-Body Message Boards

my87_5spgta · 10-19-2009, 08:36 PM

I have 87 trans am with a dig dash digital climate control.I was wondering why i had no heat to find out that whoever had the car before me had the heater hoses bypass the hearter core.I just put a New heater core in and still no heat? All the climate switchs seem to work? Anyone know how to check this climate control or what to check next?
Thanks

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CreepingDeath94 · 10-19-2009, 10:51 PM

If you have hot water going through the heater core and you still have no heat, it is probably a problem with the blend air door. I'm not familiar with the digital set-up, but on vacuum ones, the control switch/lever determines where the blend air doors will go/what they will actuate between upper/lower ducts and hot or cold ducts. So for whatever reason, it sounds like the blend air doors are not getting the signal to go to heater core for heat when you select it on the control. Fuses maybe? Check the connections behind the controller if it is all electric and not vacuum fed? If it is electric and not vacuum servo operated, motors for the blend air doors maybe...check them? Like I said, not real familiar with the digital set-up, but it should be pretty easy to determine if you have vacuum feeds or not. If it has vacuum feeds, check the vacuum lines/hoses for breaks...possibly the vacuum servos/diaphragms could be bad.

my87_5spgta · 10-20-2009, 12:31 PM

Quote:

Originally Posted by CreepingDeath94

If you have hot water going through the heater core and you still have no heat, it is probably a problem with the blend air door. I'm not familiar with the digital set-up, but on vacuum ones, the control switch/lever determines where the blend air doors will go/what they will actuate between upper/lower ducts and hot or cold ducts. So for whatever reason, it sounds like the blend air doors are not getting the signal to go to heater core for heat when you select it on the control. Fuses maybe? Check the connections behind the controller if it is all electric and not vacuum fed? If it is electric and not vacuum servo operated, motors for the blend air doors maybe...check them? Like I said, not real familiar with the digital set-up, but it should be pretty easy to determine if you have vacuum feeds or not. If it has vacuum feeds, check the vacuum lines/hoses for breaks...possibly the vacuum servos/diaphragms could be bad.

Thanks i will ck it out!!

John in RI · 10-21-2009, 12:59 AM

No ( or Low temp ) Thermostat ?? Is the engine reaching operating temp ??

ikeepitreelz · 11-10-2009, 12:05 PM

Hmmm.. I have the same car with the push style button climate control, If you stand in front of the engine bay on the left side coming out of the firewall there should be a small black hard plastic hose coming out and it should be plugged in to a valve,more or less located about 12 inches or so behind the a/c compressor, the valve has a black water house coming into it..i had the same problem. You can also check under the passengers side foot well and look up to see if the door is stuck. P.M me if you can't find the hose i can take a pic of it and you can go by that. Good luck!!!