Hi,

I'm building a Luego Velocity but using the MNR rad and stat. I have had 2 stats off MNR now (a 3 pin and a 2 pin) but I can't get either to trip the fan relay. I have measured both for continuity and resistance when cold and in boiling water. I have also measured them in the car cold and when it reached 110 degrees and nothing no change what so ever.

Has anyone had any experience with these on how they used/wired it up. I know my loom is correct because if i short the 2 connections to the stat the fan comes on.

Cheers

Make sure you check that the water is actually covering the statswitch!

I have had it twice now where the reason it doesn't switch on is because there is air in the system and there is actually no water covering the stat.

The way to stop this is to loosen the switch to the last thread and then start the engine and run it until it gets to the temp the fan is supposed to cut in and water starts to seep out of the statswitch hole, then tighten it, this should ensure that the air is bled out the system.

HTH,
Rich.

Check the plug connections and the socket connections are in the same place. We had one where the the male plug on the loom had 3 possible connectors and only 2 were occupied. The bottom one didn't correspond to the one on the radiator so it was effectively a blank. It was pulled out and pushed into the other socket and worked perfectly after that. This was after 2 new senders, several fuses and much head scratching and cursing. The loom was from a well known supplier.

Thanks guys.
There is water getting to it.
I designed and built the loom and have tested it and know it works. I only have 2 connections to it.
The only thing i can think of at the moment is that the rad is keeping the water in it too cool even when the engine is hot and therefore the stat isn't activating.
Does anyone know of another source of the stat but a lower temperture.
Cheers

Have you got the stat in the engine the right way round? It sounds like it's keeping the hot water in the engine and not opening to let it into the rad.

could be a possiblity, can't remeber ever taking it out, but the preious guy may have. I'll have look.
Which way should it be?