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Andrew
Andrew, ASE Certified Technician
Category: Honda
Satisfied Customers: 1703
Experience:  ASE Master Tech and experience on Honda for 12 years.
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Fans run at full power when ignition on & carry on for approx

Customer Question

Fans run at full power when ignition on & carry on for approx 2 mins after keys removed on 06 civic 2.2 i-cdti. Have disconnected thermo swich at base of rad, fans continue to run, went out when grey relay in under bonnet fuse box removed engine light came on but fans stopped when swiched off, then next journey no engine warning but fans faulty again.
cheers
Trevor
Submitted: 3 years ago.
Category: Honda
Expert:  Shantal-Mod replied 3 years ago.

Hello Trevor,

I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.

I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.

Thank you,

Shantal

Customer: replied 3 years ago.

 




I can continue to wait, cheers. Trevor

Expert:  Andrew replied 3 years ago.
Hello Trevor, my name is Andrew and I will be happy to assist you with your Honda questions today! So the cooling fans are staying on but when you remove the cooling fan relay the fans go out? I ask this because the relays are bad about having the contacts sticking internally and causing this type of problem. If that is the case I would replace the cooling fan relay as the first step and see if the problem continues.
Customer: replied 3 years ago.

Hi Andrew, apologies for late reply, I haven't been available for a few days. I have since removed the grey relay again and the fans continued to run so fault is not straight forward & today fault has vanished, for how long I don't know, but I'm not feeling that reassured at present.

Expert:  Andrew replied 3 years ago.
Ok sounds good.....let me know.
Customer: replied 3 years ago.

Hi Andrew, back to same fault today, removed grey relay one fan stopped removed 40amp fuse both fans went out came back on , with both disconnected could here electrical buzz from top right of engine disconnected sensor plugs but couldn't locate, I think a trip to the dealer is looming,


Regards


 


Trevor P S tried disconnecting battery for long period to reset parameters but no success

Expert:  Andrew replied 3 years ago.
Did this buzzing seem to be coming from the fuse box where you removed the relay?
Customer: replied 3 years ago.


no I don't think so but I didn't have my stethoscope to pinpoint it I will check during week as mine is at work let you know


 


Trevor

Expert:  Andrew replied 3 years ago.

Ok sounds good.

Customer: replied 3 years ago.

Hi Andrew, buzzing coming from solenoid behind Bosch unit at back of cylinder head (transmission end). Could not remove plug as in awkward spot behind wiring loom under bulkhead. Relay controlled as cuts out after approx. two min's . Where is relay that operates solenoid as it cuts the fans out too? Tests were done with grey relay & 30a fan fuse 15 ( in front of grey relay) removed.


Cheers


 


Trevor

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