By most accounts, these fans come on only when temps are extreme. I know I only ever heard my fan when the sensors unplugged or back when first bought it - because the head had gone. I'm thinking that maybe the manual switch is a good idea to remove a bit of heat before it gets out of hand, coupled ...

Ah just got to the end, glad your sorted now.
May I ask what you ended up having done and what the total cost was?

Thanks for all your thoughts. It's a tricky decision, in a way it would be better if the cost was either £1000 or £10,000. It would certainly be easier to make up our mind what to do!

Having had a good chat to the garage who are looking at it (ADS) I think the rest of the van is in pretty good ...

g8dhe wrote: Wed May 16, 2018 7:32 am Are you sure the Air Con is OFF ? Otherwise the tempeartaure sensor may have failed.

Do you know by what method the fan activates when the air con is on? Is it a switch or does the ecu play a part?

Would disconnecting the battery for a while help?
Failing that it's either replace the sensor or install a manual switch with a digital temp gauge as to accurately judge when it should be manually turned on.

I didn't preview my first post so it looks confusing. Help please. Is this correct? clearance cold:
Inlet 0.1mm +/-.005 mm
Exhaust 0.2mm +/- .05 mm
set No1 cylinder (cambelt end) TDC power stroke.
valves (from cambelt end)
1 3. 4 6. 7 9. 10 12. inlets
2. 5. 8. 11. exhaust
adjust 5,7,9,10 ...