Question about 1993 Mercury Grand Marquis

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Can't get any heat

The heater core was changed and thermostat also but no heat

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The only thing left to check is the rad see if it is blocked somewhere get it flushed out

Posted on Dec 10, 2008

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2 Answers

I changed the thermostat but it still does not heat up what else could be wrong


Heater needs Heater Core, Heater control valve, air diverter inside the car and hot water in the heater core. If you just change the thermostat you must have had a reason. If the car was running hot it could be a radiator clog. If the core is clogged no heat. If the heater core was drained when you changed the Tstat there may be air in it - if so no heat. If the control valve (on the heater hose) does not shift- no heat. If the diverter door in under the dash does not direct the fan air through the heater core- no heat.

Jan 03, 2016 | Cars & Trucks

1 Answer

How to change thermostat in a 2003 ford windstar


Is the problem the thermostat, or is the heater control blend door not diverting the blower air across the heater core....or is the heater core clogged? The thermostat is actually the least likely cause of cool air in the passenger compartment.

Oct 17, 2014 | 2003 Ford Windstar

1 Answer

My 1984 grand marquis does not get heat


did everything said to do put new heater core in and a new thermostat instill no heat

Oct 08, 2012 | 1984 Mercury Grand Marquis

1 Answer

Fan is blowing but no heat is coming out


check the heater core and change the thermostat

if the car is over heating then the heater core is bad if not then it is definitely the thermostat

if it still continues then check the heat control panel

Dec 05, 2010 | 2005 Mitsubishi Galant

2 Answers

My heat works on the passenger side and not the drive i've changed the thermostat and still the problem hasn't changed


If you have good heat on one side, it can't possibly be the the thermostat. Good heat on one side means that there is plenty of hot water (water and antifreeze mix) circulating through your heater core. The thermostat controls the temperature of the water. If you have hot water, the thermostat is not at fault. Your Impala is equipped with what is called "zoned climate control". All the inside air (both sides) is still heated by the same heater core. The difference between a "zoned" system and a conventional system is that there is more than one "blend-air" door insided your HVAC housing. The blend-air door swings back and forth to direct the incoming air either through the heater core (for hot air) or around the heater core (for cold air) The drivers blend-air door may be broken or the motor that moves the blend-air door is malfunctioning.

Oct 10, 2009 | 2005 Chevrolet Impala

1 Answer

No heat after changing thermostat.


remove the heater core lines the two hoses that go to the heater core, take a splice tube either metal our plastic your part store will have either one. take the splice tube and install it in one of the lines add some hose to that tube make the hose long enough to run out side of the engine compartment and on to the ground. take the other hose and install a flushing tee, hook up to a garden hose and trun the water on . what you are trying to do is flush the heater core , you are also looking for blockage off the heater core, if you little to no flow i would suggest replaceing the heater core

Dec 16, 2008 | 1991 Ford Escort

1 Answer

No heat,ch.thermostat,water is circulating,blower goin strong .


Check the 'heater control valve'. This valve opens when u turn on the heat switch on the dash, so the hot coolant will flow thru the heater core and provide heat. So although the coolant is circulating in the engine, the valve controlling the flow to the heater core is stuck closed, or not working.

Nov 15, 2008 | 2000 Ford Focus

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