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#1
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Had lots of heat, but now none
I'm sure this has been covered, but I can't find an answer to me specific problem. When I bought my '82 300D a couple of months ago the heat was full blast all the time - I could not adjust the temperature. When the cabin got to warm I would turn the heat off. Just about when it got cold enough that I would not mind having maximum heat I stopped having any heat at all....well once in a while for about 3 seconds a little warmish air comes out, but otherwise it's just cold air....maybe almost lukewarm air at best.
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Mercedes Benz
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#2
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Remove the electrical connector from the monovalve and see what happens.
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#3
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Sounds like a bad monovalve.
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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 |
#4
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I've been told that if both hoses on the monovalve are warm, then it's no the problem. They are.....I can't feel a temp. difference from one to the other.
Right now I would be happy to just have lots of heat tomorrow. If the problem is a bad monovalve can I just bypass it as a temporary solution without harming anything else? Seems like that should be OK.....
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Mercedes Benz
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#5
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Quote:
Unplugging the monovalve might give you heat, but as someone pointed out the other day, it might not if the diaphragm has a tear in it. Bypassing the monovalve with heater hose shouldn't cause any problems.
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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 |
#6
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Why is the monovalve there anyway?
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Charlie --------------------------- '66 VW 1300 96K miles '97 E300D 239K miles '85 300D 203K miles (sold Sep 2012) |
#7
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It was designed to increase postings, thereby increasing advertising dollars, for the Diesel Discussion. It has been a far more successful product than the previous device intended to do the same thing since unlike the initial product the monovalve has never been labeled 'evil'.
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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 |
#8
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I wanted to ask the same question but was afraid I would not get an answer as logical as Kerry's
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Mercedes Benz
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