HOW TO FIX, STUCK IN DEFAULT DEFROST?

1998 Mercury Mystique

Tiny

HUTCH

April, 20, 2012 AT 10:54 AM

1998 Mercury Mystique stuck in default defrost, how can I repair this problem (IS THERE A VIDEO & WRITTEN INSTRUCTIONS ON HOW TO FIX THIS PROBLEM). Thanks again!

FOUND 911 RELATED QUESTIONS

4 Answers

Tiny

cadieman

April, 20, 2012 AT 11:22 PM

This is caused by low vaccum. Youll need to check the vacuum at the servo that controls the defroster door.

Tiny

HUTCH

April, 21, 2012 AT 2:32 AM

Hi, cadieman! HUTCH here, this servos your talking about, is this located inside under dash by heater core? Is this also called something like a check valve, where I have to remove the inside center console? HOW DO I CHECK THIS? HELP ME OUT WILL YOU? I really appreciate all the help! Thanks again! HUTCH

Tiny

HUTCH

April, 21, 2012 AT 2:34 AM

Hi, cadieman! HUTCH here, this servos your talking about, is this located inside under dash by heater core? Is this also called something like a check valve, where I have to remove the inside center console? HOW DO I CHECK THIS? HELP ME OUT WILL YOU? I really appreciate all the help! Thanks again! HUTCH

Tiny

cadieman

April, 22, 2012 AT 10:41 AM

The servo is the one by the heater core. Youll need a vacuum tool check the vacuum at the hose. Then u check the servo for proper oper. You pump the tool and the servo operates in and holds vacuum wthout loosing air.U will have to check the vacuum in the sys.

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