2007 Civic Cooling Fans Not Running
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2007 Civic Cooling Fans Not Running
Running out of ideas with this one. Neither cooling fan comes on - temp gauge goes up to max. Checked with OBD live data - got to 215F and no fans. I put 12v directly to fans and they run. Jumped load side of relays on both rad and ac relays and fans work, so everything down-circuit from those two relays seems OK. Jumped ECT sensors (separately) and no luck. I also tried turning on AC to force them on, but that didn't work either (to be fair, AC has not worked in some time - don't know what issue is - and it's in the 40s here rn). I also tried swapping like relays around with no success.
Looking for any ideas on further diagnosis, or which parts to start replacing (guessing relays first?). Any help appreciated.
Looking for any ideas on further diagnosis, or which parts to start replacing (guessing relays first?). Any help appreciated.
Trial User
Joined: Nov 2022
Posts: 1
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Re: 2007 Civic Cooling Fans Not Running
Hello guys,
I am in the same situation here.I own a Honda Civic Hybrid 2007 European Specs which is also converted to LPG.
At the beginning Temp went up while driving on the highway.Max speed limit here is 120Km/h.
As soon as I slowed to 110km/h or 100Km/h the car was able to bring the temp down.
I went to the dealership and they asdvised to change the water pump (never been changed for 11 years) and also the radiator (changed 5 years with aftermarket)
At the time I didnt noticed the fans didnt work.After receiving the car from thew dealership and I only accepted to change the water pump,the car behaved WAY worse.
A trip on the highway is no longer possible while in the city the car does not overtemp
Thats when I noticed the fans not coming on.I changed my self whats called the ECT2 engine coolant temperature 2 and is located at the bottom
of the radiator.No luck with that.I checked BOTH fans directly with 12V and they work on high.I swapped relays but with no luck.
I took the car to a car electrician and he found (I dont know where) another temp switch to be faulty and changed that. Nothing has changed , my car still
overheats on highway
If anyone has service manuals I would like to have a look
Best regards
atheos_mb
I am in the same situation here.I own a Honda Civic Hybrid 2007 European Specs which is also converted to LPG.
At the beginning Temp went up while driving on the highway.Max speed limit here is 120Km/h.
As soon as I slowed to 110km/h or 100Km/h the car was able to bring the temp down.
I went to the dealership and they asdvised to change the water pump (never been changed for 11 years) and also the radiator (changed 5 years with aftermarket)
At the time I didnt noticed the fans didnt work.After receiving the car from thew dealership and I only accepted to change the water pump,the car behaved WAY worse.
A trip on the highway is no longer possible while in the city the car does not overtemp
Thats when I noticed the fans not coming on.I changed my self whats called the ECT2 engine coolant temperature 2 and is located at the bottom
of the radiator.No luck with that.I checked BOTH fans directly with 12V and they work on high.I swapped relays but with no luck.
I took the car to a car electrician and he found (I dont know where) another temp switch to be faulty and changed that. Nothing has changed , my car still
overheats on highway
If anyone has service manuals I would like to have a look
Best regards
atheos_mb
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