Climate Control unit is getting ON/OFF often.
10

Asked by Azzu Nov 25, 2014 at 04:18 AM about the 2000 Mercury Grand Marquis

Question type: Maintenance & Repair

Hi , While driving, AC is getting ON and OFF and that time I can hear some switching sounds from climate control unit. Sometimes It starts ON again and sometimes it stop AC for long time. kindly guide me to find the rootcause and i would like solve this by myself.I need an advice from experts. thanks

4 Answers
970

Douglas answered 9 years ago

What kind of heater control do you have? Electronic Automatic Tempature Control (EATC) manual

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10

Azzu answered 9 years ago

Hi Mr. MArk, It is EATC. often Ac is getting on/off and also i can hear switching sound from the panel.

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Phillip answered about a year ago

Bad alternator. Should be about 14.4vdc, but when the voltage spikes to about 15.5vdc, there is a protection circuit in the EATC that shuts it down to protect it.

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