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Offline Tumaca

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Temperature light on
« on: 02 December, 2018, 07:00:42 PM »
Hi.

The temperature light is on everytime i am in heavy traffic (going to work in the morning, for example). Sometimes the fun does not turn on and others is working but the light comes on anyway.

What i have done is:
  • New thermostat
    New ECT sensor
    New fan relay
    Level in radiator and reserve tank
    System bleed

If is applied 12v to the fan connector it turns on everytime.

More ideas??
« Last Edit: 02 December, 2018, 07:01:16 PM by Tumaca »

Offline phild

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Re: Temperature light on
« Reply #1 on: 02 December, 2018, 07:56:33 PM »
People will advise you, and I wouldn’t normally disagree with their advice, to do things in a logical order.

However, my wife’s CBF600SA had the same problem (from new and the dealer said there was nothing wrong!), temperature light coming on in traffic, eventually spraying coolant out of the overflow, fan refusing to work.

All basic checks, coolant change, thermostat change etc costing over £120.......I decided to spend £11 on a new fan relay......problem fixed.

Normally I wouldn’t go straight for a relay, but for £11 (€14), I’d give that a go.

 :028:

Offline Tumaca

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Re: Temperature light on
« Reply #2 on: 02 December, 2018, 08:00:11 PM »
Thanks but... The fan relay is new and the problem is still there...

Thanks anyway  :028:

Offline Shed

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Re: Temperature light on
« Reply #3 on: 02 December, 2018, 08:48:50 PM »
As applicable to any new part, just because it is 'new' never assume it is actually working properly. Test it.

Testing relays vid:



« Last Edit: 02 December, 2018, 08:59:31 PM by Shed »

Offline phild

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Re: Temperature light on
« Reply #4 on: 02 December, 2018, 09:40:17 PM »
 :0461:

My wife’s bike had been doing it from new. We were on the verge of replacing the fan and motor, which would of cost us a lot of money.

Therefore, the relay was faulty when the bike was put together.

Offline Tommo2

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Re: Temperature light on
« Reply #5 on: 03 December, 2018, 10:07:45 AM »
A wire to my fan was not connected properly when new. Causing similar problems. I have found the CBF soon gets hot anyway, in traffic or ticking over.

Offline Shed

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Re: Temperature light on
« Reply #6 on: 03 December, 2018, 06:36:39 PM »
*Originally Posted by Tommo2 [+]
I have found the CBF soon gets hot anyway, in traffic or ticking over.

 :0461:
Deffo. Only takes a few minutes standing still, or barely moving, and the fan is on.

Offline Tumaca

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Re: Temperature light on
« Reply #7 on: 03 December, 2018, 06:59:36 PM »
I will check (again) the relay. In fact, I exchanged the fan relay and the fuel pump relay (both are the same part number) to be sure that is working fine. I mean (sorry for my English), right now the fan relay is the one that was working as fuel pump relay and the new relay is working as fuel pump relay.

I am starting to think that maybe the fan is not reaching the necessary rpms to keep the temperature low??

Offline Shed

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Re: Temperature light on
« Reply #8 on: 03 December, 2018, 07:30:02 PM »
*Originally Posted by Tumaca [+]
but the light comes on anyway.


Are these of any use?

Offline Tommo2

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Re: Temperature light on
« Reply #9 on: 03 December, 2018, 07:44:12 PM »
You will hear when the fan cuts in. If you are riding and it is hot, you will soon now by the hot air coming off the radiator. The fan should cut in before the red light goes on. Have you checked the fan is working? I think you said it works if current is connected direct. Maybe temperature sensor.
« Last Edit: 03 December, 2018, 07:47:53 PM by Tommo2 »

 


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