Support Team Shaun_E Posted August 4, 2003 Support Team Share Posted August 4, 2003 There are lots of threads at the moment regarding temperatures, I guess because of the hot weather or tours to foreign parts . Can someone tell me the temperatures at which things should work on a K series? 1. Standard thermostat - I believe this should open around 88 degrees but can someone confirm? 2. Fan switch - what temp does it come on and what temp does it go off? My new radiator (Radtec) seems to do a much better job of dumping heat, especially when car is moving. However in traffic the fan doesn't come on until over 100 degrees which I think is too late. Once it comes on it cools things down pretty quickly. I intend to fit a manual fan override switch but would like the temp controlled one to work properly too. Cheers, Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
Glenn Wheeler Posted August 4, 2003 Share Posted August 4, 2003 I have had the same problem for years with my HPC, had to fit an overide in the end. One thing you can do is make sure that the temp sensor site for the fan is not airlocked. Cheers Link to comment Share on other sites More sharing options...
lotusandy Posted August 4, 2003 Share Posted August 4, 2003 2003 1.6 K Roadsport My fan seems to come on at around 85 degrees temp never goes above 90, but then I don't suppose the gauge is terribly accurate. Andy. Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 4, 2003 Author Support Team Share Posted August 4, 2003 Glenn - pretty sure that the fan switch is not airlocked as it is right next to the radiator top hose. I'll fit an override switch as soon as I can. Andy - 85 degrees sounds too early as the thermostat isn't even fully open at that temperature. As you say it could be the gauge is not accurate. Cheers, Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
lotusandy Posted August 4, 2003 Share Posted August 4, 2003 Shaun, Just checked the current build manual, states fan should cut in at 92 degrees. HTH Andy Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 4, 2003 Author Support Team Share Posted August 4, 2003 Andy, Cheers - that's what I needed. Looks like mine is cutting in a bit late so I'll order a new one. Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 4, 2003 Author Support Team Share Posted August 4, 2003 Just called Caterham and they told me the switch is an 86 - 95 i.e. it switches on at 95 degrees and back off again at 86. Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
F355GTS Posted August 4, 2003 Share Posted August 4, 2003 Shaun if you want one that cuts in a bit earlier the R500 one is a few degrees lower Mark Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 4, 2003 Author Support Team Share Posted August 4, 2003 Mark - cheers and thanks for your mail over the weekend. Thankfully it all went together in the end. The fan switch Caterham supplied me with didn't seem to fit when I tried it and with an Ali radiator I was unwilling to force it. I had to take the switch out of the old radiator and that went in easily. Caterham assure me that there is only one fitting of switch and that given the number they get through (admission of fragility?) they would have spotted a problem by now with the batch. Could they have shipped the wrong part? i.e. is there anything else that looks like a fan switch? Maybe the thread on the new one was just a little rough and would have gone in with a little more force applied but I am sure that the pitch of the thread was different to the old one. I'm not sure what to do now - Caterham say send it back and they'll check it out and replace it but maybe it was the right part and it was just me being stupid . Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted August 5, 2003 Author Support Team Share Posted August 5, 2003 OK it was just me being stupid 😳. I tried the new fan switch in the old radiator and, with a bit of fiddling, it eventually fitted. Turns out that the thread on the switch was not very well finished which is why it wouldn't screw in to the new radiator properly. I screwed the switch in and out of the old radiator a few times to clean up the thread and then it went in the new one no problem. Fan now comes on at a more respectable temperature in the low 90's. Shaun Yellow SL #32 Link to comment Share on other sites More sharing options...
SteveP Posted August 5, 2003 Share Posted August 5, 2003 Going purely on the temperature gauge in my R300, the fan kicks in at around 83-84C I'd say and clicks off again when the reading is a fraction under 80 - even in the hottest weather, it remains constant at a fraction over 80C Like I say, only going by the gauge, but it's never hit 90C or even come close SteveP Link to comment Share on other sites More sharing options...
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