Yesterday my heat quit working, but it was working just fine earlier that day, then later that night it started working again??? Could this that my thermostat is going bad? or sumthin with my heater core? Also my engine temp gauge has been running pretty high the last month or soo...then when I turn the heat up, it'll go back to normal, then turn the heat down-the engine temp goes right back up in about 15-20 secs.? Thanks,
Jay
Jay

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