Question about 1999 Mazda 626
Have checked the coolant. I have changed the thermostate. The radiator cap seems to be working properly. Both of the hoses exiting the fire wall are hot. I have seperated the AC coil duct enough to look up in to see if any thing is blocking the air flow. All looked clear from what I could see. The heater still blows cool air. I have read about a blend door that could be affecting the tempature. Any help would be fantastic
Under the dash board on the passenger side is where the heater core is located anything associated with the blend doorwould also be located there as well.
Posted on Feb 12, 2012
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Posted on Jan 02, 2017
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Physically look in the radiator under the cap for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, have it boiled out, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.
Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it
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