Heat blowing all the time!!!! PLease help me turn it off!
06-09-2007, 04:51 AM
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Heat blowing all the time!!!! PLease help me turn it off!
The heat blows all the time! I have tried every adjustment to the dash etc. I turn teh dial off, set it to cool, close the vents, etc triued everyting, but still blows hot air all the time!!!!! Anyone got any ideas how to fix?
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06-10-2007, 03:32 AM
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Originally Posted by aribop
His clip is fine. It has some other issue....
E
06-11-2007, 11:50 AM
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I have the heat blowing all the time problem too.
Clips are new. Turning the temp **** does nothing. I pulled the fuse to the blower and push the recurculate button so I don't die from the heat.
Suggestions?
Clips are new. Turning the temp **** does nothing. I pulled the fuse to the blower and push the recurculate button so I don't die from the heat.
Suggestions?
06-11-2007, 12:04 PM
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I haven't done this myself, but I remember a thread within the past year or so, where someone did the clip fix but still had too much heat.
Turned out he didn't have something on the rod that controls the flap at the right place when he put it back together.
I'm off to do a search, will update if/when I find it.
Edit; couldn't find it in a few minutes. Can't remember off hand whether the damper is supposed to be fully open, closed, or halfway when the clip is attached, but opposite of where it is now might be a good idea
Also found this:
The second problem <common to "944 heat on all the time" problems> is with the heater control valve.
The heater control valve is vacuum operated and located at the back of engine near the firewall. There is a vacuum line that goes from the valve to a vacuum connection at the firewall where the heater hose connections penetrate the firewall. Check this vacuum line to make sure it is connected and doesn't show any signs of cracking.
There is another vacuum line fitting near the heater hose connections, which goes to a rubber "Y" connector. One side of the "Y" goes to a small check valve attached to the large brake booster vacuum line at the back of the firewall. The other side of the "Y" goes through the firewall to a plastic vacuum retention canister next to the battery.
Make sure all these lines are connected and don't show any signs of cracking. If all vacuum lines are properly connected you may wish to remove the heater control valve from the system and check it's operation with a vacuum tester.
HTH, let us know how it goes.
Turned out he didn't have something on the rod that controls the flap at the right place when he put it back together.
I'm off to do a search, will update if/when I find it.
Edit; couldn't find it in a few minutes. Can't remember off hand whether the damper is supposed to be fully open, closed, or halfway when the clip is attached, but opposite of where it is now might be a good idea
Also found this:
The second problem <common to "944 heat on all the time" problems> is with the heater control valve.
The heater control valve is vacuum operated and located at the back of engine near the firewall. There is a vacuum line that goes from the valve to a vacuum connection at the firewall where the heater hose connections penetrate the firewall. Check this vacuum line to make sure it is connected and doesn't show any signs of cracking.
There is another vacuum line fitting near the heater hose connections, which goes to a rubber "Y" connector. One side of the "Y" goes to a small check valve attached to the large brake booster vacuum line at the back of the firewall. The other side of the "Y" goes through the firewall to a plastic vacuum retention canister next to the battery.
Make sure all these lines are connected and don't show any signs of cracking. If all vacuum lines are properly connected you may wish to remove the heater control valve from the system and check it's operation with a vacuum tester.
HTH, let us know how it goes.
06-11-2007, 06:29 PM
#13
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I replaced the Control Valve inside the engine compartment and things got better, but not perfect.
Can someone post a reference to where this "Clip" is located? a picture would be great.
Another Symptom... it seems to get better if I turn the air conditioner on... even though Air Conditioner is not charged and is about to get deleted (bonus points for links to AC Delete options besides Paragon's) ... something flips under the dash to bring in cooler air.
Can someone post a reference to where this "Clip" is located? a picture would be great.
Another Symptom... it seems to get better if I turn the air conditioner on... even though Air Conditioner is not charged and is about to get deleted (bonus points for links to AC Delete options besides Paragon's) ... something flips under the dash to bring in cooler air.
06-12-2007, 12:28 AM
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The clip is located near the gas pedal. Go down all the way under there, look up, and you will see a small white clip (looks sort of like a body clip) holding a linkage rod (or it might not be if it fell off obviously.) Here is the link from PCA under tech tips and click 944 up to 1986 and thehn click Heat and ventilation you will see perfect description
06-12-2007, 10:16 AM
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Dallas, here's something else from Search:
And for EJnNM...
But note that this is for 85.5 and later cars; the early cars used a different HVAC temp control system.
And apparently, Zims sells a metal clip for a longer fix. I was about to say "permanent", but who knows how long these cars will be on the road
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Originally Posted by OZ951
My 85 944 NA was blowing hot air constantly and it turned out to be the control cable - it had become disconnected from the control valve in the engine bay (near the rear of the engine as previously described.) The connection of the cable to the valve is via a simple dog leg (bend in the wire). When I re-inserted the cable in the valve control arm the constant hot air problem was resolved. This was a 5 minute, no cost fix (for a change).
under the dash, about where your right knee is, there are a couple of electric motors that control the movement of the door in the heater system. The link that drives the blend air door breaks and the door falls to the full hot position. There may be a black plastic cover over the linkage, if so it is held on by two screws, remove it and you will see a cadmium plated rod and hopefully a broken white nylon clip. Ir there is a problem with the vac. supply to the heater control valve it also fails in the hot position, in other words it requires a vac. supply to close the valve. The valve is located behind the cyl. head, on top of the bell housing, if you can see the linkage pulled in when the engine is running with the heater set to cold, then the vac. supply is O.K.
And apparently, Zims sells a metal clip for a longer fix. I was about to say "permanent", but who knows how long these cars will be on the road
More from Search