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Low coolant? bad thermostat? Heater core plugged, restricted, or airbound? Temperature control not working properly? Water pump not circulating coolant?
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∙ 16y ago
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Why is the heater blowing cool air in a 1999 Mercury Cougar?
Your thermostat is stuck open.
Air conditioner is only blowing cool air but refrigerant is full of freon. Heater not blowing hot air either?
Check the temperature control cable
Why house heater blowing cool air through vents AC seems to work fine cool air?
Well, its a hard quiestion, but to be truthful, there is no cure haha
Why is heater blowing cool air when car is warming up?
that's because you have to let get started and you havent used for little and it turns down
Why is my 2004 ford explorer a c blowing hot when idle and cool when driving but not as cold as it use to be?
sounds like you need some freon.
2004 Yukon XL and two of the ac vents are blowing hot air while the others are blowing cool air what does that mean?
There may be a stuck vent door or an issue with the heater blower control head.
Why is a 97 explorer blowing cool air periodically and surges when heater on at stops?
99.9% chance that you have the common broken blend door problem. Follow my user name to my Bio page for a link to the HeaterTreater web site. This site has diagnostic information and a bullet proof fix for the problem ford4me
Why wont my heater blow out hot air only cool air on my 1999 Chevy Tahoe?
if this system uses dex-cool flush the system
Why is 1992 Ford Tempo heater blowing cool air?
Possibly low coolant level, or temperature control door either set to cold or not working correctly.
Your air is blowing cool but your house will not get cool?
Turn it on high
What could be wrong with the ac on my 2000 ford van it is full of freon and the compressor is running it is blowing cool air but not cool enought?
Check the heater control valve. If it's stuck slightly open, the heater may be fighting against your AC system. BTW, that's the most common reason for the condition you describe.
1998 transport over heating. when the temp gauge is normal heater is blowing hot when temp gauge gets hot heater blows cool replaced thermostate Why would it be over heating?
This would indicate that the system is low on coolant when the gauge is hot. Not enough coolant to service the heater core.
