TimD Posted March 7, 2017 Share Posted March 7, 2017 Do these go bad from time to time? Finally got my car fired up and my radiator isn't kicking in. If I unplug the fan switch the fan runs constantly, plugged in, it doesn't run at all. If I earth the fan switch plug, the fan stops. So the only thing it can be is the switch/sensor, surely? Quote Link to post Share on other sites
TimD Posted March 7, 2017 Author Share Posted March 7, 2017 Must have been an airlock, I've tested the switch and that's working fine. Quote Link to post Share on other sites
funny onion Posted March 8, 2017 Share Posted March 8, 2017 Have you checked the relay? the relay died on my 70 the other week ... could be that? Quote Link to post Share on other sites
TimD Posted March 8, 2017 Author Share Posted March 8, 2017 I've done all I can to test the sensor, and it seems to be working. Even went so far as to remove it, and heat it up externally, which kicked the fan in. My radiator needs modifying so I can't really test it again now until that's done and I've done a few other things. Just hope I haven't done any damage to the new engine, it edged toward 100 degrees before I turned the thing off in a panic. Quote Link to post Share on other sites
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