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#1
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86 420 no heat when moving
1986 420sel the heater will work while i am sitting still but when i start moving or rev the engine up the air turns cold.
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#2
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This sounds more like a flap problem to me, meaning that the flaps are moving into the "cool" position for some reason. Maybe a vacuum problem. Hot water in the heater core won't turn instantly cold.
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Chuck Taylor Falls Church VA '66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe |
#3
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check the climate control system out
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#4
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Sounds like a broken monovalve diaphram.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
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