Reddit reviews 2013newestseller New Dc12v Heat Cool Temp Thermostat Temperature Control Switch Thermometer -50-110°c

I installed the same fan setup on my 94 about a year ago, works pretty good so far. For sensor placement I would suggest the left hand (if looking from the front) side closest to the battery. This way it's reading the temperature of coolant that has already passed through the radiator and about to go into the block.



Edit: I'm currently using this adjustable temp switch though I'm thinking about installing a couple of these programmable sensors to control the main 40amp relays that run the fans. Another thing to remember is to make sure you wire any automatic sensors to cut off with the engine. I love the idea of having my fans run a little extra to prevent boil over but they can drain your battery on a hot day.

> I found some Amazon reviews/comments with some good suggestions/directions

I think that is this thermostat? Here is a pic that seems useful: http://i.imgur.com/SnAKVkM.jpg

From what I can understand you need to know the Amperage of the humidifier, if it is more than 20A the relay won't be able to handle it.