1998 Chev S10 Blazer- heater blows air thru the defrost vents and is not heated ??????????????
Well FOR THE FIRST PROBLEM YOU PROBABLY NEED TO REPLACE THE THERMOSTAT IT IS MORE THAN LIKELY CLOSED SHUT NOT LETTING COOLANT INTO THE BLOCK TO CIRCULATE THE HEATED COOLANT 2ND THE UNIT IN WHICH CONTROLS THE TEMPERATURE OF THE INSIDE OF THE VEHICLE IS OR MAY BE BAD I WOULD START WITH THE THERMOSTAT FIRST BEING THIS IS USUALLY A MORE COST AFFECTIVE SOLUTION GOOD LUCK!
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i have a 1998 ranger the heater sends out only hot air not blended to a comfortable level i have to turn the heat off and on to control the cab temperatue
heater just blows cool air
BLEND DOOR MOTOR WILL CAUSE NO TEMP CHANGE
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