Heater problems, car occasionally running hot

2006 SCION TC
128,100 MILES • 1.6L • 4 CYL • AUTOMATIC
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BJACOB1129
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Sometimes when I turn my heater on, it blows cold air. When it blows cold air the temperature gauge quickly jumps to 3/4 of the way hot and sometimes to almost hot. My water pump was just changed and there is collant, its full. When the heater is off, the temperature gauge stays in the middle.
Nov 25, 2013 at 8:17 PM
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JACOBANDNICKOLAS
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It sounds like either you are low on coolant or there is an air pocket in the system. Have you tried bleeding the air from the cooling system? Has this problem started since the water pump was replaced?
Nov 26, 2013 at 6:11 AM