Discussion
What he said.
Because the fans take quite a bit of current it is fairly common for contacts in the circuit to fail e.g. relay pins can weld themselves into the their socket.
Likewise the connectors by the fans can suffer quite serious corrosion. As advised change the otter switch as these also fail.
Because the fans take quite a bit of current it is fairly common for contacts in the circuit to fail e.g. relay pins can weld themselves into the their socket.
Likewise the connectors by the fans can suffer quite serious corrosion. As advised change the otter switch as these also fail.
Edited by Loubaruch on Sunday 27th February 21:33
The modwise kit is what is keeping your fans running when you turn off the engine.
With the fans running have you tried turning the modwise control dial to a hotter temp to get the fans to stop?
It is reading the water temp on the inlet side of the radiator. If you just switch off the engine with the fans running the water will stop circulating and the fans will run until the water cools naturally in that water inlet pipe.
When I park if the fans are running I usually pop the bonnet to aid airflow and wait for the fans to stop before I switch off the engine.
There are also 2 modwise kits. I have an early one which has just 1 dial to bring the fans in at half speed and the otter switch brings them in at full speed, but I know the later kits have 2 dials, a half speed fans temp and a full speed fans temp.
Which do you have?
With the fans running have you tried turning the modwise control dial to a hotter temp to get the fans to stop?
It is reading the water temp on the inlet side of the radiator. If you just switch off the engine with the fans running the water will stop circulating and the fans will run until the water cools naturally in that water inlet pipe.
When I park if the fans are running I usually pop the bonnet to aid airflow and wait for the fans to stop before I switch off the engine.
There are also 2 modwise kits. I have an early one which has just 1 dial to bring the fans in at half speed and the otter switch brings them in at full speed, but I know the later kits have 2 dials, a half speed fans temp and a full speed fans temp.
Which do you have?
HI,
I have the later two dial mod. When I am out driving, not matter how low the temp gets on the gauge, the fans are on full all the time.
When I park up, the fans are on full even if I turn both dials up to max ( 120 ).
The only way I have managed to get the fans to stop, is let the car cool right down ( fans on full ) and then start the engine. The fans switch off immediately and don't go back on until the engine gets hot again.
Martin
I have the later two dial mod. When I am out driving, not matter how low the temp gets on the gauge, the fans are on full all the time.
When I park up, the fans are on full even if I turn both dials up to max ( 120 ).
The only way I have managed to get the fans to stop, is let the car cool right down ( fans on full ) and then start the engine. The fans switch off immediately and don't go back on until the engine gets hot again.
Martin
OK, so because they do actually turn off when you restart the engine is good. It means the kit is monitoring the water temps but because the engine isn't running the fans are cooling the water in the radiator but not the hose, when you start the engine that cool water is pushed around the system and is being detected by the modwise sensor.
Is the modwise temp sensor in one of the hoses feeding the radiator?
Which side?
Is it inside the hose or outside and covered in a foil wrapper?
For reference mine is outside and foil covered and attached to the left hose as you stand looking into the engine bay (offside)
Is the modwise temp sensor in one of the hoses feeding the radiator?
Which side?
Is it inside the hose or outside and covered in a foil wrapper?
For reference mine is outside and foil covered and attached to the left hose as you stand looking into the engine bay (offside)
K67 KRB said:
I shall have a good look and let you know!!
Out of interest, as I have this mod installed, is that making the otter switch obsolete?
As mentioned in the link, the otter switch is still in the circuit just in case the adjustable stats are turned up too high. Out of interest, as I have this mod installed, is that making the otter switch obsolete?
At the otter switch simply unplug it and check again.
It sounds like you have the voltage “top up” from the starter supply. That will latch the circuit on until the ignition is turned off.
If you have any questions just ask .
Dave,
When I switch the ignition on from cold and turn the half speed dial to zero, the fans come on half speed. If I then turn the full speed dial down to zero, the fans come on full. So all of that seems to be working.
I then set the dials to 80 half speed and 95 full speed.
The issue is, once the engine is running, the fans come on full really early and stay on regardless of engine temp. It doesn't matter what I set the dials to. If I then turn the engine off the fans stay on full. I have left for over half an hour and they are still running. If I then turn the engine over, the fans stop.
If the otter switch is still in the circuit, is it possible that it is faulty and overriding the two stage dials? If I disconnect the otter switch, the two sage should still work, yes?
Many Thanks for advice,
Martin
When I switch the ignition on from cold and turn the half speed dial to zero, the fans come on half speed. If I then turn the full speed dial down to zero, the fans come on full. So all of that seems to be working.
I then set the dials to 80 half speed and 95 full speed.
The issue is, once the engine is running, the fans come on full really early and stay on regardless of engine temp. It doesn't matter what I set the dials to. If I then turn the engine off the fans stay on full. I have left for over half an hour and they are still running. If I then turn the engine over, the fans stop.
If the otter switch is still in the circuit, is it possible that it is faulty and overriding the two stage dials? If I disconnect the otter switch, the two sage should still work, yes?
Many Thanks for advice,
Martin
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