Maybe check the sensors? My 84 300d had several thermostats. There is one on the left front of the engine, one on the thermostat housing. They short out to block when they are hot. Try shorting out the wire on the thermostat housing.
Does it blow when you press the defroster button?
Carl
On 2/22/2013 5:32 PM, BStromsoe wrote:
Mary's heater works great after 1/4 mile. I changed the monovalve 1 year ago. Blower is great - but A/C compressor leaks so I have no A/C until I put a new compressor in place.
Martha's blower is not working. I do get heat, but can't blow it out. My wife isn't happy about that. Her A/C is not working either. Once I get the blower blowing, I'll tackle the A/C.
Always something to do in MB land.
brian from laverne, ca
Mary (195K) Martha (280K)
1983 w123 300d's
From: Aleph93 <aleph93@ca.rr.com>
To: diesel_mercedes@yahoogroups.com
Sent: Friday, February 22, 2013 2:20 PM
Subject: [diesel_mercedes] No heat or fan when cold out, though fine when warm.
I've noticed that my A/C unit is getting worse this winter, luckily I'm
in SoCal.
When it's cold out (40* or below) I get no heat or fan , though it's
fine later when it has warmed up.
This morning I had no heat or fan the 10 miles to work.
Has anybody else had this problem? If so, what was it, or fixed it?
I have the horizontal buttons (Clima-II). I have changed the fuses
lately, repeatedly clicked the buttons off and on, set the heat dial on
MAX. I want to get A/C fixed for summer, yet want to get a head start on
the system.
Thanks
Rob
'85 300D
Garden Grove, CA
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