heater

Asked by GuruC57TN Feb 07, 2019 at 05:40 AM about the 2004 Mercedes-Benz CLK

Question type: Maintenance & Repair

heater not blowing hot on clk 240

2 Answers
7,675

Brian answered 6 years ago

Could be stuck water valve, vent flap issue, or the CCU unit. The water valve can get gummed up. Some people have had some luck taking them apart and cleaning. Has the cooling system been flushed in the past few years? If not might be time for that. Only other suggestion is the thermostat itself but you did not mention if the engine temp gauge is getting up to proper temperature or not. Good Luck!

Mark helpful
44,300

Hornet_2497 answered 6 years ago

Top up your coolant level in both the radiator and the coolant overflow bottle. Also test coolant freezing point to make sure it is not slushed up and can't circulate.

Mark helpful

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