Questions & Answers for: mercury marquis defroster stays defrost

stays on when the switch is on. The ac clutch is disengaged when the switch is off, but if you turn the switch on (engine off) the clutch locks in. When the engine is running the compressor evaporator

...Mercury Grand Marquis will only blow hot air when ac is on. The ac system does work lines get cold but will not blow nothing but hot air. Has automatic climate control system. Will direct air from ...

...marquis where the a/c is only blowing on the defrost and floor at the same time. When you push just floor or panel it does not change it stays on defrost and floor. please help either a vac. supply ...

...stays on high all the time. A/C works but will not come out dash vents, comes out defrost and changes to floor when I accelerate. Thanks for your help. Cecil Your problem with the blower motor only ...

...Marquis, and then it wouldn't start, I recharged the battery and put it back in, but it drains immediately, I replaced the alternator, but that didn't help either. Had both the battery and alternator ...

...stays up. A little harder to check would be the Rear Window defroster which can activate without an indicator light showing. After that, suspect a hanging Relay, which is continuing to supply power ...

how come I get hot air from my cars vents when I turn the air conditioner on. when I turn my a/c switch on the vents blow hot air, everything else has checked as working normal someone said that my ...