Quote:
| Originally Posted by 1996 328ti Could be a loose cable to the temp dial.
If it's cold at idle and luke warm at speed, that might be the problem. You need to remove the glove box and knee bolster. Reinstall cable and secure with a small screw.
Another possibilty is a faulty bypass valve located on the firewall. I would replace that first since it might be easier. |
I found this thread because I had the same problem. The heater was warm at best, but only if you turned on cab air recycle. Without the cab air recycle it wasn't warm at all.
We had it serviced yesterday and they replaced the thermostat (said it was stuck open). The heat works
better, no doubt, because now we have somewhat-hot air without cab air recycle turned on, and pretty-hot air with the cab recycle on. However there are two things bugging me:
1) Am I spoiled by every other car I've ever owned? Or are we supposed to feel HOT air coming out of our 318ti vents? My mazda blows damn-hot air, and with the new thermostat the beamer's air isn't as hot as the mazda's.
2) This is a mystery: if I turn the blower selector dial to the place between feet & face, the air turns COLD. The outside air is cold here right now.
Do you think it could be a faulty bypass valve? That is some strange behavior...my thinking is that the air should always be hot regardless of blower dial position, and if I fix that problem the hot air should also be hotter.
Anyone have any ideas?