Question about 1996 Mercury Grand Marquis

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Honda 1999 heater will not get hot

Have checked thermostate both hose are getting hot have flushed and still no heat

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Are you sure the heater valve is opening? on that car its probably got a climate control and the valve is electronically operated and no power to valve i'd believe its closed

Posted on Aug 02, 2009

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Posted on Jan 02, 2017

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1 Answer

Heater hoses do not get hot.Have replaced thermostate and still do not get heat inside the cab,What can I do?


Try this trick take the hoses off the heater core and flush it out with a water hose to get the airout the heater core.don't do it with the car running.goodluck

Dec 04, 2011 | Cars & Trucks

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I have a 4cyl 1999 Jeep Wrangler. The heater only blows warm air, no hot air. I have back flushed the heater core with a garden hose and there was no clog. I have checked the t-stat and it is...


The key is the heater hoses. The top hose is the inlet for the heater core and the bottom is the return line. If the bottom hose is not hot, there is little flow through the heater core. It does not have to be completely clogged to reduce the heat output. The core needs to be flushed multiple times IN BOTH DIRECTIONS through the heater hoses. If this does not restore the heat, try a commercial/radiator flush. Many people have had alot of success by filling the core, through the heater hoses, with a CLR type product and letting it sit for 10-15 minutes to remove scale followed by a thorough flush.

Jan 08, 2011 | 1999 Jeep Wrangler

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I have a 96 sl saturn. takes half an hour for my car to reach running temp. When i start driving the engine cools down so far, to the point i have no hot air for my heater. I replaced the thermastat, i...


replace the thermostant again this time get a hotter temp thermostant and buy it from the dealer, the other thing is that these cars are known for the temp sensors being bad this would give you the false reading on the gauge but would not affect the heat, if its taaking a long time then i would replace the stant and this time or before replacing the stant i want you to flush out the heater core, remove the hoses from the heatercore and use a water hose to flush water through the heater core, a plugged core will not throw heat or will start to allow water to flow when it gets good and hot to flow through the retricted core due to rust and crud, try the flush first and then try a new temp sensor if the flush helps the heat, hope this is helpful good luck.

Jan 07, 2011 | 1993 Saturn SL2

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No heat in 1995 crown victoria, thermostate has been changed. the rad was flushed, Hoses top is warm to hot, lower is warm to cold , car is not overheating


feel the hoses that go into the heater core at the firewall,if both are hot,either a door under the dash is stuck shut or you need to flush your heater core by removing both hoses and flush with water hose

Jan 31, 2010 | 1995 Ford Thunderbird

1 Answer

I replaced thermostate in august it still ran hot


The problem is the fan. The actual fan just behind the radiator.
They have a "clutch" that;s replacable so don't buy the entire fan AND clutch.
A simple test is, spin the fan blades with the engine off of corse. If it spins rather fast, that's the problem. It SHOULD have some resistance and stop quickly.
:-)

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1 Answer

2004 chev impala, no hot air for heat, changed thermostate no difference


Get the heater core flushed if youy can verify that the valve in the upper heater hose moves when you go from hot to cold.

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1999 chevy silverado the heater doesn't put out heat. the engine temp comes up to 190 degrees and the fan works but no heat


Check the valve on the upper heater hose and make sure it moves,if it does then you need to have the heater core flushed.You can do it your self by removeing the heater core hoses from the heater core and runnin water through it with a garden hose but a rad shop can do a better job.If you choose to do it yourself pick up a bottle of rad cleaner first and put it in the rad a few days before you flush it.

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Heater in truck does not put out much heat


check the hoses going into the firewall for the heater and see if they are getting hot before you go too far. if one is hot and the other is cold then you may need to flush or replace the heater core.

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Low heat from heater


Had same problem. Take off both hoses to the heater core at the fire wall. Using a garden hose with nozel flush with water on the "inlet hose" first(the one hot to touch) then flush the other side. A nasty blackish slim will come out. Oh, cover your distributor with a plastic bag first so it won't get wet. Put the hoses back on, set heat for full high and enjoy your nice warm bravada again!

Dec 16, 2008 | 1999 Oldsmobile Bravada

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