BMW E36 Forum

Anyone with a sub and amp experience problems with there heating?
Iv had my fair share of headaches from the cooling system in my car but now iv a new one and im 100% sure its from the sub in my boot. My car wont produce ANY heat when idling!! Its been wrecking my head the last 3 or 4 months, bring the revs up to around 800rpm and its perfect though. Iv checked everything and eve though electrics are'nt my forte, everything looks grand. I decided to unhook the anp and sub and as soon as i did the heating was fine!!
Anybody else experience this?

That is really weird! First time I hear about the heating being affected by a car's amplifier and a sub? When the amp is connected, does the fan work? I mean does it bring cool air instea of hot air? Wait, you're not talking about the engine temperature gauge right?

Sorry, the internal car heater. Yea everything works fine, then when the revs drop down to idling the heater starts blowing out cold air. Unhooked the sub and amp, tested and all was fine, reconnected sub and amp and there it was again, cold air at idling. Bring the revs up by 200rpm and it pumps out hot air again.
Iv checked and rechecked the amp and sub and its all wired in exactly as it should be, powered and and earthed.

I don't think this is related to the Amp or the sub. I believe you need to put more antifreeze and water in your radiator which should fix the problem. If you already have it filled to the mark, then you need to check the heater valve for dirt. The reason why the heater works fine when the RPM is high is that water circlulates fast at high RPM than low RPM. So, if the heater valve is dirty or clogged, the water will move even slower when the RPM is low and it means that cold air doesn't have the chance to be heated enough. That's why you feel cold air at low RPM while it's working fine on high RPM.

I hope this helps.

Unfortunatley ive already checked all that and its fine.
I know i know diddly squat about electrics but iv checked and rechecked the wiring and its all perfect. Doubting myself, i unhooked sub and amb AGAIN and heating was fine at idling

Gonna bring it up to the garage i used to work at, on friday and see if they can come up with anything!

Please let us know how it goes. Sorry for not being able to help.