temp senders role in engine/air con management

[christover1]

I replaced both temperature senders/sensors as one had broken it's terminal.
Not only does it read temp better, and the engine runs better,
but air con now works again, and its extra cooling fan no longer stays on?
Must have a trigger for air con in cooling circuitry.?

I discovered problem during a coolant replacement,
It had an idle high/sporadic problem after the change,
that was fixed by bleeding air out of cooling system.

You learn something new everyday.
My first lesson in EFI maybe

[christover1]

Thought it was all well, but fan stuck on again, tho all else was still working.

Problem solved, don't use thread tape on parts that need to earth
I just put it back as I found it, obviously not always the best way.

Also one of new senders, altho correct on the packet,
had different number stamped in it.
Will go back and grizzle at them.

But the original air con sender works ok now its better earthed.