Hi Derek, on my car I have a two speed fan and used to have the lower speed connected to a manual switch for some time, over time and probably due to another failure of a radiator fan switch the lower speed wasn’t connected anymore. The fan was now fed through a relay as when the switch was used to directly feed the fan the switch was prone to failure. I found the dual temperature switch on eBay although I only searched for radiator fan switch, when the dual one turned up I thought why not. After that I bought a simple on/on switch so I can select which ever I want, a lot of this stemmed from when I changed the zetec thermostat and found the fan would be running at the engines normal running temperature, hence the original reason for the search. I like to be able to power up the fan whenever I may want but also have the fan stop when the temperature drops, without anymore input from me Bill
Sent from my iPhone On 9 Feb 2020, at 13:11, Derek Clews <derekcl...@gmail.com<mailto:derekcl...@gmail.com>> wrote: Hi Bill, So you found an unusual replacement, then? Just wondering what advantage that would give in real world conditions over a manual switch to back up the standard thermostatic single output switch. Or worth fitting a two speed fan as well? Still that is why it is worth asking a question on here. Folks come up with all sorts of ideas and experiences. Great! Derek On 8 Feb 2020, at 10:27, bill <bill_green_2...@hotmail.co.uk<mailto:bill_green_2...@hotmail.co.uk>> wrote: The last radiator mounted fan switch I fitted was a dual output for two speed fan, one output was 88c the other much higher, I run on the higher temperature leg, I’m going to connect both through a common on/on switch so I can easily select either Bill Sent from my iPhone On 8 Feb 2020, at 10:18, Dave English <dandh.engl...@gmail.com<mailto:dandh.engl...@gmail.com>> wrote: Hi Derek I had to replace my fan switch last year and ended up with the lower temperature one (88C-95C), my thermostat is the same as yours, an 88C one. If I were you I would go for the 98C to 103C you mentioned because I find the fan can come on with the engine at normal running temperature (needle in the middle), which means it's on a lot more. The switch I took out was a 98C to 103C but, as I was doing the replacement with a full water system, I didn't fancy holding my finger over the hole until another switch came through the post! The next time I need to drain the system, I'll fit a higher temperature switch. (Shouldn't be long, the increasing differential whine means a replacement gearbox is now required, so I'll need to drop the engine down.) Regards Dave English Q2-009 -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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