Question about 2004 Mazda Tribute

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Heater doesn't consistently work

The heater will work when first turned on but then turns cold. If you shut off the heater for a bit and then turn it back on, it works for a very short time. We blew out the lines and removed a bunch of gunk but that did not solve the problem. The heater does not consistently stay warm.

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  • Mazda Master
  • 14,036 Answers

Sound like radiator and heater core plugged with rust and debris.need have radiator shop flush out the system or buy a flush kit at any auto parts stores.

Posted on Nov 18, 2013

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Posted on Jan 02, 2017

  • 29 Answers

SOURCE: 1992 mazda mx3 is overheating. checked thermostat

Check your coolant. If the coolant is low, you won't get heat in the cabin. Make sure that the fan is turning on as well. Check coolant sensors also. Good luck!

Posted on Aug 09, 2009

  • 7 Answers

SOURCE: cold air coming out car heater, turn heat up to 90

check water level in rad if ok check thermostat or couldbe a plugged heater core.also check for vacum to heater door is working

Posted on Nov 21, 2008

Thunder55
  • 318 Answers

SOURCE: Heater making angry noise!

Your heater fan bearing is shot,,time to replace Fan now before you really need it.

Posted on Jan 19, 2009

emissionwiz
  • 75822 Answers

SOURCE: I cant get the heater to work, and cant control

this problem is caused by a defectivce air temperature control blend door actuator motor, to replace this part requires the entire dash assembly be removed.

Posted on Oct 27, 2009

Testimonial: "Thanks alot! I way afraid it was something that was going to require the entire dash being removed!!! Have a great day!"

  • 174 Answers

SOURCE: When driving, heater blows warm air. When idling, cold air.

It sounds to me like you have a plugged heater core, or one that is beginning to plug. With the engine running, carefully feel the two hoses that lead from the engine into the heater core in the firewall. If one of those hoses is colder than the other one then you heater core needs to be replaced. This involves removing a bunch of stuff under the dash. Sometimes it's pretty easy and sometimes not. Start by removing the glove box and you should be able to see the plastic housing for the heater core.

Posted on Dec 15, 2009

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When i first turn on my heater i have nice hot air but over a period of 5-10min air goes cold. Turn off the heater and turn it back on air is hot again but goes cold like before any ideas????


All I can think of is something is plugging up your heater core. When you turn it on--the coolant tries to rush into the heater core (which in case you didn't know is behind your glove box) and it pushes said obstruction to the point where it closes off the line.

When you shut the heater off--the coolant is not trying to pass tthough the heater core any longer--so the obstruction follows gravity to the lowest point away from the heater core.

I dunno, very strange.

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Where is the little door that closes off when you turn on the heat to turn the cold air flow off


ITS THE SAME DOOR
The thing that turns them over from hot to cold is a air valve that shuts off the clod water and opens the valve to let the hot water to go around the heater system so you get hot air,,, and when you turn the switch to cold it turns off the flow of water to the heater and so it blows cold.
Have a goodday Ron

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