My heat will not work properly

2004 MAZDA MPV
134,678 MILES • 6 CYL • FWD • AUTOMATIC
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KHIBABY23
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My problem started about 2 weeks ago, when it really started to get cold. When i turn the heat on in the car, sometimes it works, sometimes it doesn't. Some days it will start out cold and never heat up or the heat will come on for like 3 minutes and then it sarts to blow cold air. What could be the problem?
Jan 20, 2008 at 6:31 PM
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STRAILER
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Hey KHIBABY23,

This problem sounds like the cooling system is low on coolant ior the temperature blend door actuator is not working. Please wait until the engine is cold and check the level, also here is a guide that will help you.

https://www.2carpros.com/articles/car-heater-not-working

Please run down this guide and report back.
Mar 13, 2017 at 1:02 PM
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GOLF11527
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my 2000 mazda mpv will only throw heat from the passenger side of the car, no heat from drivers side only cool to luke warm, what could be the problem?
Mar 13, 2017 at 1:03 PM (Merged)
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JACOBANDNICKOLAS
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If it has dual climate control, check the blend air doors. One could be sticking.
Mar 13, 2017 at 1:03 PM (Merged)
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GOLF11527
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I had this problem and had to replace the temp blend door motor cost me $121.00
Mar 13, 2017 at 1:03 PM (Merged)
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JACOBANDNICKOLAS
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Check for vent doors in the HVAC system that are not opening and check to make sure the plastic duct work is still all attached under the dash.
Mar 13, 2017 at 1:03 PM (Merged)
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PANDOTA
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Did you ever get this fixed. I have the same problem
Mar 13, 2017 at 1:03 PM (Merged)
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DA CHEVY BOI
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Had heat on passenger side at first changed radiator and now no heat
Mar 13, 2017 at 1:03 PM (Merged)
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LOVE69
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I have heater on my front vents blow nice warm air out but my back ones blow cold air ????
Thank you for your time...
Mar 13, 2017 at 1:04 PM (Merged)
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DARKLO
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lukewarm heat through out van but driver side remains cold.
Mar 13, 2017 at 1:04 PM (Merged)
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HMAC300
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try pulling fuse HVAC inside car it may be a stuck actuator and pulling fuse for sixty seconds may reset it. See picture for testing.
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Mar 13, 2017 at 1:04 PM (Merged)