2001 Ford Ranger heater won't heat when temp low

2001 FORD RANGER
105,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MGALEXA
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I've watched the temp gauge and it mid-lines as always, after ~5-7 mins or so. Therefore, doesn't appear to be thermostate. Seems when temp goes up, it heats better. Any ideas?
Nov 12, 2009 at 4:37 AM
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LELAND1970
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I have a 2001 2.3L that just had a similar problem...after the engine was warm, the temp. needle seemed to be where it normally was - in the middle; but when the truck was idling (at a red light for example) the engine would not blow warm air. The fix I found was that the coolant level was low. I added coolant and it seems fine now. I guess if the coolant is to low, then at idle speed, the coolant doesn't make it to the heater core, so no heat can be picked up to circulate.
Nov 30, 2009 at 1:28 AM
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