Home
Why doesn't a 1989 Mercury Grand Marquis heater get hot even after the thermostat was replaced?
Wiki User
Answered 2007-03-25 19:04:29
Heater could just be air bound and need to be bled It may have a bad heater control valve. If it has one, it will be located on one of the heater hoses by the firewall. Check the valve, and check the vacuum line going to the valve, as it may have rotted, and have come apart where it comes from the firewall, and to the valve. And also, the valve could be frozen in the closed position. If the Heater Control Valve is working-FEEL BOTH hoses-IF one is not HOT then U have a Blockage-Like a blocked heater Core.IF U put a Garden hose on one of the inlets U should have flow (both ways) check 4 a pinched or collapsed hose. If all The Previous items are checked it is possible , If the car is equipped with climate control that this portion of the system is At Fault, this was also a common problem with these cars as they aged.
Your Answer
Still Have Questions?
Related Questions
1991 mercury sable gs 3.8 liter v6 you just replaced the water pump and now your heater doesnt work and the thermostat is fluctuating and your coolant resovoir is full to the top?
check for air in the system vapor lock stinks but its not hard to fix
2001 grand marquis windshield assembly?
I have mercury marquis 2000 windshield wiper it works only on HI when i turn it low it doesnt work or lower than low stile doensnt work would you plz help me?
How to replace crankshaft position sensor on a 1983 mercury grand marquis 302 v8 engine?
1983 doesnt have a crankshaft position sensor. you have an ignition module located on the side of the distributor.
Why doesnt the overdrive work on your 95 grand marquis It was working fine at first then stopped working I replaced the OD syliniod and trans filter?
Check the fuse. If it has a manual OD switch to turn off and on be sure it is on.
S-10 stalls when its warmed up then starts after totally cooled down?
it is most likely going to be your thermostat needs to be replaced. and if that doesnt work than time for a new radiator.
Why would your 96 accord be overheating when its full of fluid and you replaced the thermostat and the temperature gauge doesnt go past a quarter and you smell antifreeze under the hood?
It could be that your heater core is blocked or damaged somehow.
Why doesnt a 2000 Chevy lumina operate at normal temperature?
Replace the thermostat.
Why doesnt heat work in 96 Dodge Intrepid?
could be a sticking thermostat.
What can cause your 2001 Chevy Malibu to overheat?
if the pump and thermostat have been replaced on a 2001 malibu and it overheats and the heat doesnt work now but the air does. do it need bleeding still , will air in the line still cause that problem...
Why doesnt Mercury suport life?
Mercury does not have enough atmosphere and is too hot / cold to support life.
Where is the thermostat for a 1988 ford bronco with a 5.7 engine?
Ford doesnt have a 5.7l. On a 5.8 it is behind the thermostat housing at the front edge of the lower intake.
Cooling fan doesnt come on till 260 degrees?
may be a bad thermostat
Why wouldn't you have heat in your ram250 van when the hoses into and out of the heater core get hotwarm after idling even tho the water in the radiator doesnt get warm?
Sounds like your thermostat is done for. The water in the hoses is probably heating up from being close to the hot engine. This continued to happen to me after i replaced the thermostat twice thinking maybe i had bought a bad thermostat turns out it was the heater core. Both the front and back were pluged.
Does Mercury float?
No it will not float, iron doesnt float in it. therefore it will not float.
Why was Iron replaced by bronze?
iron corrodes easily, bronze doesnt
Does the element mercury harden?
no it doesnt -_- Mercury will freeze (become a solid) at -38.83 degrees Centigrade or -37.89 degrees Fahrenheit.
Why doesnt heater get very warm in 96 jeep?
Thermostat and/or heater core may be defective
Why doesnt your 1989 Jeep Cherokee blow warm air?
Can be a thermostat stuck open. Replace the thermostat and service the cooling system. Can also be a heater control valve malfunction.
What does Planet Mercury do to help earth?
It kills Zombies ... wtc, it doesnt do anythig
Why doesnt mercury have an atmosphere?
because its blown away bye solar wind
How do you replace thermostat on your ford ram pickup 1990?
ford doesnt have a ram pickup ram is dodge
Grand marquis radio doesnt work but light up when cars on?
Sounds like receiver ok, check the speakers/fuses.
Why doesnt the gas on a gas giant escape into space as it has on mercury?
Because the gas giants have huge gravitational force compared to the one on mercury
Why doesnt the cooling fan turn on you replaced all the sensors and it still doesnt turn on?
Check the fuses, check the relay and then check the fan motor.
Cars & VehiclesMercury Grand MarquisCar Computers and SensorsCar Fuses and WiringAuto Parts and RepairsChevy S-10Antifreeze and Engine CoolantChevy LuminaDodge IntrepidChevy MalibuPlanet MercuryThermostatsAmerican CarsHeater Cores and Blower FansChemistryElements and CompoundsJeepJeep CherokeeFordAstronomy
Still have questions?
