Honeywell RTH8580WF WiFi Thermostat "car fan working" Questions

car overheats not all the time and fans don't turn on when overheated it leakes fluid but don't know from where. wake up in morning there is a puddle of antifreeze A pool of antifreeze doesn't always ...

...fan comes on. Look for a circuit board if the unit is 15 years old or newer. On this board you should see a S type fuse plugged in to it, a 3 to 5 amp fuse. Blue or amber in color. It is just like a ...

fan to come on at all. Check the control board in your unit. There's a fuse on it. Either a small glass "buss" style or a flat blade style, like you find in a car. it sound like you have lost 24vdc at