Just bought a 09 honda crv awd with 65k miles on it.
Runs great. It is completely up to date on all its service. Coolant is full and looks good.
However, I am stumped with this one issue. I am pretty mechanically inclined when it comes to cars. Have built a few motors in the past, so I am not totally in the dark. There are many people that have far more knowledge then I do. Which is why I am posting this thread. I have had no luck on some other forums posting this question. I know there are some mechanics here.
So the other day it got cold here. I decided to turn the heat on. That is when I noticed the radiator fan cycling on and off every 15 seconds or so. When I turn off the heat off it stops. Turn the heat back on, and boom it starts cycling on and off again. I know when you run the A/C that as soon as the compressor kicks in, the fan usually turns on as well.
But why the fan is turning on when using the HEAT is beyond me, and also why is it cycling on and off every 15 seconds.