I just changed out the coolant on my 07 Fit. I wasn't able to take out the drain bolt on the engine, just the plug under the radiator. After the radiator was empty, I filled it up (with Honda coolant) and started the engine.

After being on for a while, maybe 15-20 minutes, I noticed the radiator fan wasn't running still. I drove the car around the block several times and it still didn't come on. I turned on the A/C and only the A/C fan was running, and not the radiator fan.

So I let the engine cool down, and took off the radiator cap again. It needed a little bit of coolant, maybe 1/4 cup. After filling to the brim, I ran the engine with A/C, still no radiator fan.

Any help?