Fan switches
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I think its a different type your on about Tom. I think the type your on about is a pipe that you screw a normal radiator type switch into, little more than a bimetallic switch. The type I used is a thermistor and a transistor along with a variable pot so you can tune the temp. Completely electronic hence why it has a relay as there isn't anyway for the transistor to dump heat when its sitting on a 90 deg pipe in the first place. Its a good idea to use a relay with your type of switch as well by the way, especially if your running big fans as it will stop the switch from welding itself or burning the contacts.
- The Original Tom
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Although I mentioned the X-eng one (linked) I don't have one, just suggested it's a good one. 30A won't burn out as most fans draw only 7A constant, my first one was only 5A!
The switch I have, which has the capillary, does now have a relay attached. The NO terminal was rated at a max of 6A, and although this was ok for the original fan I've now relegated that to the "on load" fan, it won't deal with the twin-fan setup from a Disco 2 I've bought for the main fans.
The switch I have, which has the capillary, does now have a relay attached. The NO terminal was rated at a max of 6A, and although this was ok for the original fan I've now relegated that to the "on load" fan, it won't deal with the twin-fan setup from a Disco 2 I've bought for the main fans.
Rover 3.5 V8 landy - Completely rebuilt and purring... Now awaiting a good tune!!
- The Original Tom
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- Location: Crowborough, UK