no heat above 2200rpm ??????

[Jason89i]

i picked up a new car a couple of days ago. this one has me stumped. i get lukewarm air if its idling up to about 2000rpm. once the engine goes over 2200rpm, it gets stone cold. it doesnt matter if i am rolling or sitting still. same symptoms. i replaced the water pump and thermostat.....didnt help. any thoughts?

you're the man stu...... swapped the hoses, problem solved. for the record: spider hose from oil filter housing goes to the upper heater core pipe, coolant hose off back of head goes to the lower heater core pipe.

THANKS.
jason

thanks, jason

[Rob]

blower motor perhaps?

[Stu]

blower motor perhaps?

I've seen a similar problem once, hot air at idle but cold once off-idle. The coolant hoses running to the heater core were backwards, swapping them solved the problem.

[Jason89i]

I've seen a similar problem once, hot air at idle but cold once off-idle. The coolant hoses running to the heater core were backwards, swapping them solved the problem.

thanks.....i will give it a try and post the results.

just a couple of days ago i replaced the wpump, thermostat and check all plumbing lines. i even removed the hoses to the heater core to check for any resistance....they freely blew air and water. if only i had tried swapping the lines....

thanks again. jason

[Jason89i]

The coolant hoses running to the heater core were backwards, swapping them solved the problem.

you're the man stu...... swapped the hoses, problem solved. for the record: spider hose from oil filter housing goes to the upper heater core pipe, coolant hose off back of head goes to the lower heater core pipe.

THANKS.
jason

[BimmerToad]

good thread / info : Just fixed my heater problems :D