Please help !! This is what I have done so far still with no results.
1) Replaced thermostat
2) Replaced fan switch
3) Changed the relay (swopped with another) and checked fuse.
4) Ran the fan directly from the battery and it works
But the fine just does not kick in at all whne engine is hot. Please help !!
On some car, like in my renault, there is an additional fuse box near the engine.
Buy the complete Haynes manual for your car, it will show diagrams and picture of all parts, and eventually tell you which fuses and parts are involved in the radiator fan wiring.
Once you have the diagram you follow the circuit leading to fan and find the fault, it shouldn't be complicate.
Hi,
I am assuming that you are referring to the radiator fan. You need to verify that the fan motor is receiving 12V when it is supposed to be kicking in (engine hot) with a DVM (voltmeter) in its actual location. Having done this and likewise verifying that the ground is properly attached/connected, then your problem would be with the "clutch". Radiator fan clutch differs from aircon compressor clutch which is electrical and the transmission clutch which is mechanical. Most radiator auxiliary fans (not directly coupled) uses "silica oil". This oil has an inverse property, that is when hot it gets thicker and thus the rotation of the motor is transferred to the blades. There would be a filling hole adequately plug in or near the front of the fan assembly.
If your concern is not corrected by the addition of silica oil or if you can not measure 12V on the fan connector itself when it is supposed to kick in, then chances are your problem is electrically related. Some fan motor switching systems are coupled to the aircon switching.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
I'm having the same problem in my 2000 honda civic lx except I replaced the radiator fan switch and then drove the car all day it was fine. Even with the a/c on it was great. On my way home it started overheating again. I did replace the thermostat... Any ideas? Plz help
Hi,
I had the same problem. Today i Fix it!!!! Check the timing belt. Mine was a littlle off, and set it in Time and BOOM it WORK Thermostate running and fan working.
One option is to have your radiator overhauled and cleaned. the water might not be circulating smoothly in the radiator that explains why your water in the reservoir is overflowing and your temp sensor is not sensing the circulating water because there might not be circulation.
SOURCE: Radiator fan not working
Javier23, I see you replaced the fan switch, I believe you need to replace the 'cooling fan control'. This reads the coolant temp and passes info to the engine control computer, which signals the cooling fan switch to cycle on and off. It seems to be the only missing piece of the puzzle. Let me know how u make out.
If your heater is not heating your vehicle adequately, it could be the result of a few different things:
1) Your thermostat could be stuck in an open position. This will result in your vehicle being underheated. Typically, a thermostat opens only when an engine reaches a certain operating temperature. If a thermostat is stuck in the open position, radiator coolant flows into an engine before it reaches normal operating temperature. This prevents adequate engine warming and results in engine underheating. DIY repair costs: $5-$10
2) Your radiator could be low on coolant. If this is found to be the cause, then you will have to inspect your coolant system for leaks. Depending upon what type of leak your vehicle has (if this is found to be the case), I would have this repair done by a shop unless it is something reasonable simple to fix like a water pump leaking. A replacment water pump will run you $70-$100.
3) It could also be a defective switch.
Good Luck!
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Forgot to mention that this is for a 1997 Honda Civic Vtec
my resevor is always overflowing fan go on new thermostat
replaced fan relay with another one. still overheats. I also have the overflow tank level rising -- makes me think that the proper vacuum is not being created to reverse the flow of coolant back into the radiator.
I have the exact same problem with 97 Civic LX - cooling fan not coming on/
I have checked:
- fuse is good
- relay is good
- cooling fan is good (wired it directly to battery)
Also start car and turn of A/C should make both cooling and condensor fan run, but only condensor fan runs. My take from this is that the problem is not the Engine Coolant Temperature switch.
Any other suggestions would be welcome.
Thanks
i have a 95 civic and have replaced the radiator fan motor, the thermostat, and the relay switch, the issue keeps going on the fan wont turn on but i did notice when i replcaed the relay switch the fan powerd on no hassles and now doesnt any longer.. i havent checked the fuse inside yet but i will and might check if the relay switch still works..
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