Temperatures have dropped in VA this week and I find that I'm getting no where near the amount of heat from the heater/defroster as compared to before. Coolant level is between low and high, temperature gage reads in the center after warmup (when it is intermittently working) and car drives normally. I replaced the head gasket about 70K miles ago. Fan works normally and I can get air flow from vents as selected (floor, defrost, direct etc.)
I suspect the heater control valve and have a spare on hand. I plan to replace it this weekend. Is there anything else I should check?
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