1990 Mazda 626 Heater Blows Cold

MAZDA 626
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10FOTUCK
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  • 28 POSTS
1. It takes about 3-5 min and temp gauge is in the middle.2. Heater core hose on bottom is hot but top hose is just warm I can wrap my my hand on it and thats even after I have driven it for 30 min.What do ya think? I should replace first or check? 90 Mazda 626 4 cyl. Automatic. 69,000 mi.
Jan 16, 2007 at 10:38 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
[quote:20b7c89a71="10foTuck"]1. It takes about 3-5 min and temp gauge is in the middle.2. Heater core hose on bottom is hot but top hose is just warm I can wrap my my hand on it and thats even after I have driven it for 30 min.What do ya think? I should replace first or check? 90 Mazda 626 4 cyl. Automatic. 69,000 mi.[/quote:20b7c89a71]

Try the thermostat-inspect the heater core and hoses for clogging
Jan 16, 2007 at 12:24 PM

Suggested Repair

Check the thermostat, and inspect the heater core and hoses for clogging.

Conversation Summary

A 1990 Mazda 626 owner reports the heater blows only cold to warm air. The temperature gauge reaches the middle in 3-5 minutes, but after 30 minutes of driving the lower heater-core hose is hot while the upper hose is only warm. The expert recommends trying the thermostat and inspecting the heater core and hoses for clogging.

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