I was driving to work today with the heat on. the Climate control was set for low fan, with the middle switch on. For the past week or so, I've noticed some (what sounded to me like) fan noise when I put the heat on.
Today, the noise suddenly got very loud (a binding, whining type noise), and the car stalled.
With the Climate control completely off, the car seems fine. If I put the climate control on any setting, including economy, the car stalls.
Any ideas? Will I be damaging the car if I drive it with the climate control off?

Thanks,
Slim

Surely yes! Unless of course you are driving a Mercedes, in which case we would need some info, such as a model and year. Thanks.

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1989 300E 144K

How could the heater affect the engine? I could see the AC having an effect on the engine, but not the heat.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

I have the opposite thing wrong with my climate control, if I try to shut the car off with the CC on anything other than OFF, the engine keeps running. The joy of vacuum leaks! Nothing works except DEFROST in the CC either.

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1980 240d
1999 SL500

sounds like a bypassed fuse, and a seized blower.
excessive amp draw, alternator loads up and with a weak running motor, pop, down she goes!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Try disconnecting the wires to the AC compressor (so the it can't engage) and try it.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

When my compressor siezed, it nearly stalled the engine (at idle).

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Sharing my partner's 2012 Forte 5dr SX til I find my next 123 or 126..
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Do I miss being a service advisor ???

Depending on what year and model, the AC compressor sometimes comes on when the heat is on. I'd suspect a seized AC compressor. Remove the belt or electrically disconnect the compressor and you should be good to go.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Sorry. In my haste, I forgot to tell you: 1985 300D turbo. I talked to my mechanic, and he thinks it's the a/c compressor. in economy mode, I can run the heat (and the fan). If I engage any other setting, it engages the a/c compressor. So, if the compressor seized, it would stall the engine.

Slim

That's what I'm thinking too, but he said it also happens in "econ" mode.

yeah, I was wrong about economy mode. I was just upset and a little panicked stalling on the highway. I went out after I talked to the mechanic and tried it again parked. Economy works, every other mode stalls the engine. So, I guess I have a seized a/c compressor, no?

slim

A seized compressor sounds like the only credible reason.

And why would the AC compressor kick in while the heat is on?

__________________
" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
The Dee8gonator 1987 560SEC 196,000 miles - Sold
Orgasmatron - 2006 CLS500 90,000 miles
2002 C320 Wagon 122,000 miles
2016 AMG GTS 12,000 miles

The AC always runs unless you are in econ mode or the evaporator temperature is too low. The AC dehumidifies the air.

Defrost engages the AC in some cars. I don't know about in old MB's because my belt is off my compressor!

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