Hello I have a 83 300SD that the climate control is not operating properly. It will not activate the blower unless you roll the temp dial all the way down to max cold. I tried changing the blower relay that sits beside the fan but that was not the problem. Any help would be greatly appreciated. Thanks in advance.

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DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY.

1986 190E 2.3-16 Pearl Black!!
1987 190E 2.3-16 Smoke Silver!!
1986 190E 2.5-16 Pearl Black!!
2004 CLK 500 Cabrio Designo package!!
1994 E320 Cabrio Red with black top!!
1985 500 SEL Anthracite Grey !!
2011 Subaru Impreza STI 380HP (Yeah Baby)

If it works at max cold and max heat (check that), then blower speed #6 is OK. Could be the wire wound resistor pack is out for the other speeds. The "toaster is between the two firewalls near the brake booster.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)

Thanks for the reply. I found the problem to be the cold lock out switch at the thermostat housing.

__________________
DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY.

1986 190E 2.3-16 Pearl Black!!
1987 190E 2.3-16 Smoke Silver!!
1986 190E 2.5-16 Pearl Black!!
2004 CLK 500 Cabrio Designo package!!
1994 E320 Cabrio Red with black top!!
1985 500 SEL Anthracite Grey !!
2011 Subaru Impreza STI 380HP (Yeah Baby)