Yikes! Where's my heater?

944s2cab · 10-29-2002, 06:58 PM

Today was our first cool, crisp Autumn day (cold and wet by some opinions). I cranked up my S2, started to drive into work. Normally, the heater kicks in after a mile or two...very toasty when needed. Today, no warm air at all! I looked at my temp guage and it reads normal...never above 1/3 hot. The fans seem to work, and there was no visible signs of water levels being low. I didn't get any warm air at all. Where should I start?

Ross T · 10-29-2002, 11:19 PM

your lack of heat is most likely a result of a vaccuum hose cracked of off. T
To see, try really getting on the gas. Wind it up pretty good while excellerating. Do this with the temperature setting on hot and the fan speed at a medium setting. When you really get on the revs you should get a brief burst of hot air ( as long as the car is warmed up). Most likely you will get a bit of hot air when you do this. If so you just have a vaccuum leak somewhere.
Check where the small diameter vaccum hose goes into the heater valve. I have a 944S/968 conversion, and my heater valve is over the oil filter. I am not sure if the S2 is the same. I hope this helps.
Ross T

944s2cab · 10-30-2002, 12:20 PM

Thanks Ross, I'll look to see. When I removed the blower unit in front of center of the windshield in the engine compartment, I noticed a tiny little vacuum hose connection to it. Could that be the one you are speaking of? I can see that one slipping off with all the handling.

Ross T · 10-30-2002, 04:48 PM

Quite possibly, check that one if you can.

Sternn · 10-31-2002, 10:14 AM

I'm in the same boat. My heater has never worked, but neither has my AC. The fan works great, it just blows around whatever temperature air is already there.

Since I only drive it in the summer, and take off the top and leave the windows down its not an issue. I was thinking about fixing it, but I have checked the hoses and they are all fine, so if it isn't say a leaky or disconnected hose, where would one turn next? My engine is pretty much disassembled (rebuilding the head) so is there anything I could check now with it being pretty much open underneath there?

I also just had my shop send me a new heater/condensor unit (that big black bulky box thing). I'm thinking of replaces the whole unit but I'm not sure if that is nessessary, and I'm not sure if I need to get under the engine or rip off the dash (or both - like I had to do in my Jeep to replace the heater core there).

Should I rip apart the box and get the core out or would a whole switch be better? Is that nessessary at this point?

Thanks in advance.

-S