I have a problem with my HTR fuse (10A) blowing when I switch on the aircon. Measurig the current running through the fuse it goes up to about 22A with aircon running. Unplugging the aircon pump and plugging into a spare pump lying on the engine as an earth, I get a reading of about 4.5A for a few seconds before the AC light starts flashing and it cuts back off.

Looking at the circuit, there appear to be 2 coils in the pump. I'm wondering if it's a 2 stage thing like starter solenoids where a high power coil actuates until it's pulled in then switches to a lower power.

I could just swap pumps, but don't really want to lose £50 worth of gas if I can get round it with an external timer relay. (The aircon works fine apart from drawing high current).

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If at first you don't suck seed, try drier grain.

If you've got a spare on the bench check to see if the clutch/oulley can be removed. That way you might be able to swap the electrickery over and leave the fluid intact

I seem to remember Don having some issues in the past with his AC compressor on the blue car.

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GT4DC Events Co-ordinator
1996 ST205 UK

That was related to overtensioning the drive belt and knackering the bearing as a result.

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

So you are human, theres hope for us all yet

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2004 Subaru WRX