To test a switch ure looking for closed circuit with a multimeter set to ohms when there is a demand etc.to test a temp sensor it all depends on manufactures.each sensor has specific resistances depending on temp.again u use multimeter and test thru wires
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local