Fan

[Carl M]

Hi,

Running MS3 with a relay board, I have the Fan control on fidle (running TB's)

The fan comes on (set at 85 deg C) but after about a minute stops despite it being still activated via MS (fan light is green)

I can then switch off and re start a few minutes later and the same thing happens. The only thing I can think of is that the fan is drawing to much current and over heating one of the poly fuses on the relay board.

Anyone else any idea's?

Thanks

Carl

[jsmcortina]

The FIDLE output is likely designed for 1A maximum. A fan might be 30A. I'd suggest using an external relay.
I wouldn't recommend using the "relay board" generally.

James

[DaveEFI]

Hi,

Running MS3 with a relay board, I have the Fan control on fidle (running TB's)

The fan comes on (set at 85 deg C) but after about a minute stops despite it being still activated via MS (fan light is green)

I can then switch off and re start a few minutes later and the same thing happens. The only thing I can think of is that the fan is drawing to much current and over heating one of the poly fuses on the relay board.

Anyone else any idea's?

Thanks

Carl

Easy to probe the fan output on a relay board with a DVM. How much curent does the fan draw?

[Carl M]

Thanks for the replies, just to close out, despite using the 20A relay on the relay board to switch the fan on, the thermal fuses were cutting in as the relay board tracks are only rated to 1.1A (my fan is 8A)

So I've added a second relay and all is good.