Heater blows cold air. also, the temperature gage goes from 200 to 160 in less than a minutes. any ideas if these are related
A thermostat stuck in the open position can cause both of these problems
Even 160 degree water should blow fairly warm air from the heater. Feel the heater hoses to see if they are hot--if so, then a bypass valve in the heater air-duct system may be in the wrong position--look for loose or damaged vacuum hoses. Check the defroster ports for hot air. Check to see if the temperature gauge drop coincides with the radiator fan coming on. If not, the thermostat may not be working correctly. Also, 160 degrees seems a little cool for a modern engine (check the thermostat).
713 views
Usually answered in minutes!
×