Question about 1990 Mazda 626

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95 Mazda 626 keeps blowing heater hoses, between thermo.& firewal

? bad thermostat ? , heater core? Or What ?

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Sounds like a clogged radiator

Posted on Dec 28, 2008

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98 ford ranger no heat have changed thermostat water pump heater control valve


Maybe the heater core is plugged or you haven't bled it properly?
If the heater hose returning from the core to the water pump is NOT hot, while the hose going to the heater core from the thermostat area IS hot, then the heater core is plugged probably.
You need to remove the heater hose while cool,from the thermostat area and remove the hose from the water pump area (that's the outlet of the flow thru heater core) AND THEN take a garden hose with p-is-tol grip type sprayer,and blow water back thru the outlet hose out the inlet hose. This will blow any bad plugging material out the way it got in.
Don't apply too much pressure if it is plugged bad. The heater core isn't made to stand 50lbs. water pressure. don-ohio (:^)

Dec 31, 2016 | 1998 Ford Ranger

2 Answers

I have a 2000 Dodge Durango. The heater blows cold air, the a/c works fine. I was told this could be a bad fuse.


the thermostat that regulates the water temperature is bad. it is in the open position keeping the water from heating

Oct 01, 2013 | 2000 Dodge Durango

2 Answers

In 03 chev venture. Mini vanHeat takes long time to get hot


Do you know if the radiator is full of coolant ?
Does the gauge on the dash show the engine temp to be cold after you run the engine ?
Could be the thermostat is not closing.
If the heater hoses are getting hot, could be a blend door problem under the dash.

Jan 14, 2013 | Cars & Trucks

1 Answer

Heater is not getting hot whats the problem


thermostat could be bad, heater core could be bad, blower motor could be bad. See if the blower motor turns on (passenger side under the dash). if it does then i would replace the thermostat. depending on how old the vehicle is you may want to have it flushed, something could be backed up. the last resort is the heater core because that is really involved and timely. it involves (in most cars) taking the entire dashboard out. for a feel, years ago it took me around 8 hrs just to get the the heater core in my chevy beretta. good luck

Dec 03, 2012 | Cars & Trucks

1 Answer

Hot air is blowing cold in my 2001 ford escort flight


check coolant level first. possible bad thermostat, blockage, heater core is bad. check to see if a hose going into heater core is hot, if the hose is hot and the other is cold you have a blockage in heater core. if so, sometimes you can remove the hose from heater core and flush it out with a garden hose. if above fails, flush whole system.

May 10, 2011 | Ford Escort Cars & Trucks

2 Answers

Heater is not getting hot


stuck thermostat or low on antifreeze

Oct 07, 2010 | 2001 Ford Taurus

1 Answer

No heat occasionally unless i push the excelerator also no overflow hose could it be the thermostat or clogged heater core its a 98 mustang


Yeah, could just be the thermostat. Highly doubtful if heater core is clogged because the heater core would go bad before it clogged. When you push accelerator, that is heating the engine more, therefore circulating more water, and the water is being heated more, and that will push open a thermostat that is going bad. So start there.

Mar 10, 2010 | Ford Mustang Cars & Trucks

3 Answers

NO HEAT -SUSPECT THERMOSTAT PROBLEM


If the vehicle is overheating, then thermostat is bad. If it is not, then most likely heater-core is bad as long as heater blower motor is working.

Feb 05, 2010 | 1993 Plymouth Voyager

4 Answers

No heat cadillac 1990 fleetwood new water pump and thermostat no vacuum leaks either


flush your system the heater core may be clogged hope this helps

Jan 16, 2010 | 1992 Cadillac Fleetwood

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