Why is my car overheating after I've changed the thermostat?

Asked by Feb 27, 2019 at 08:29 PM about the 2007 Honda Accord

Question type: Maintenance & Repair

My car overheats only when standing in traffic, but
after I put the heater fan on the temp drops to
normal, I've checked and saw when the heatgauge
rises above normal the fan doesn't come on
,unplugged the fan to put power on it and it works
fine, swopped out fan relay with a/c relay and it
works fine, what else can I check?
Honda accord 2007 model cl9

4 Answers


Did you install the thermostat backwards? Try purging air out of the cooling system.

1 people found this helpful.

Car overheats when standing still because there isn't air blowing through the radiator. You switched the relays and the fan works. ERGO: defective fan relay that's now on the AC, and I'm guessing the AC now doesn't work.

2 people found this helpful.

Is this fixed?

1 people found this helpful.
Best Answer Mark helpful

Hey guys sorry for the late reply and thanks for all your answers. No it's not fix it yet I've recently done a check where I put the inside heater as well as the ac on, and while everything was on I then took out all the relays and switched it around and all the fans went on, so I'm really not sure if I must replace the thermostat and the water pump?

Your Answer:


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