No heat

[jgh]

co-worker's late 90's bmw 7 serie...740 ??

Blower works , but no heat......

Now what ??

Thanks.

[Bear]

Let's start simple. What does the temp gauge in instrument cluster show? Is the needle at 12 O'Clock or on the cool side? If yes then I would suspect a thermostat failed in the open position. Barring that, the auxiliary heater valves, on firewall and adjacent to the expansion tank (drivers side could be bad. Do you have a Bentley manual, if not I would buy one, I find it invaluable. Aslo, check the 7 series message board and archieves at roadfly.com