I have a 2002 marquis Ls, all of the sudden my heat nor air will come on,but you can hear the thermostat control clicck to go high and low and hear the vacuum going from floor to vent. Any ideas?

Sherry Thomisee

Asked by Feb 19, 2013 at 03:35 PM about the Mercury Marquis

Question type: Maintenance & Repair

2 Answers

James Ramond

check coolant level at rad.


do you have manual or automatic air conditioning? manual being a non electronic display just knobs. i dont think checking your coolant level will help any it would be a good thing to check if you just had no heat only. if you have no air flow on any speed i would check power and ground at your blower motor.

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