The heat in my 86 300 SDL works intermittently. The blower motor seems to be ok, although the speed fluctuates, but it mostly just blows in cool air when the heat is turned on. Anyone know what might cause this? Thanks,
-- Jeff
Easy one. Replace the heater water monovalve diaghragm, behind the battery on the firewall.
Bill Ditmire Ditmire Motorworks,Inc.
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