hello just wanted someone to help me out on this. okay i had changed out my thermostat and flushed out the radiator fluid. after i did all that like filled it to the top and started up the car up with the heater to the max like 5mins the car gets past the middle line and fan wont turn on. can anyone help me on this? 95 honda civic dx 2dr.

 

When you replaced the thermostat, did you by chance unplug the radiator fan switch located on the thermostat housing? If so, did you forget to reconnect it?

 

yes i did pluged it back on all the way. i also checked the fan and wired it straight to the car battery and it turned on.

 

that connector he is talking about, unplug it, and jump it with a paper clip. see if the fan comes on, you may have a bad switch.

 

did this issue exist before all this work was performed or was the work done in hopes of fixing this issue?

you may be airbound if the first is the case.

 

no it never happen to me before i worked on it. and also if any one knows that the bottom hoses dont get hot but the top one does.

 

I agree with what has been said above. Did you forget to loosen the bleeder bolt to remove air from the system during this procedure?

 

yes i did do that also. how do you find out if its the fan switch that is bad or how do i find out if theres a bad relay?

 

how do i do this?

 

it normally takes longer than 5 minute to get it to turn on. also turn your heater back to cold after youre done flushing. if you want to speed up the process, keep your revs at say 2k. i did this and my fans turned on in about 8 mins. also, youll notice your radiator fluid will keep going down, keep refilling it as you go.

 

This tells you that coolant is NOT flowing through the thermostat. Did you install it correctly? Maybe the new thermostat is defective or you still have alot of air trapped in the system. I recommend that you first redo the cooling system bleed procedure. Place the car on an inclined driveway with the front end higher than the rear end during the bleed process.

 

Did you ever figure out if it was the fan switch?