1994 S600, Heater dpesnt blow hot air???

[cibrspeed]

My a/c and my blower motor works but when i turn the heater all the way up orpartially fot that matter it doesnt go hot. Any help is GREATLY app.

christopher

[pcmaher]

Lots of things could cause a no-heat condition. Does any heat come out at all, or is the air cold no matter what speed the fan is at? Is your engine coolant at the proper level? Your thermostat may be stuck open, which prevents the engine from reaching proper temperature. It could be a duovalve problem, a collapsed hose, a cabin air temp sensor, etc etc. It would be a good move to see if there are any fault codes stored.