Temperature Controlled Switch for 12v Blower

[GorillaToast]

Hi guys.
I need a temp controlled switch to turn a blower on when the temp in a cabinet exceeds a certain degree. Off when it drops back down to a pre-set level. Basically, a thermostat.
I've been looking at some very inexpensive circuit boards with digital read outs and a probe, but I'm concerned they can't handle the wattage.

Static current: ≤ 35MA, attract current ≤ 65MA

Any recommendations?
Thanks

 

[LeslieTroyer]

Put in a 12v relay and your cheap boards will work fine. Lots of 12vrelays around

Les

 

[GorillaToast]

Thanks Les. I'll give it a go.

 

[LeoLambert310]

Look on ebay for12v temp controller got one last year for the frezzer under $10 free shipping works great easy to set and install

 

[GorillaToast]

Look on ebay for12v temp controller got one last year for the frezzer under $10 free shipping works great easy to set and install

Are you using a 12v relay with it, or just as is?

 

[Benny17441]

I can understand in an engine compartment where heat is being produced and may want to be exhausted but not in a cabinet. Fans do nothing to cool inanimate objects, they only help the "feels like" temperature for some alive organisms like humans. Now if there is a source of cooler air nearby they will help with the transfer but in an enclosed boat the cabin temperature will remain the same no matter how many fans are installed.

 

[dziedzicmj]

you can look at a computer (chassis) fan (10 or 12 cm, they are either 12 V or 5 V (USB)), many come with a temperature adjustable speed. The cost would be around $10. E.g. https://www.lowes.ca/portable-fans/royal-sovereign-dfn-04-personal-usb-fan_g2499618.html

 

[GorillaToast]

I can understand in an engine compartment where heat is being produced and may want to be exhausted but not in a cabinet. Fans do nothing to cool inanimate objects, they only help the "feels like" temperature for some alive organisms like humans. Now if there is a source of cooler air nearby they will help with the transfer but in an enclosed boat the cabin temperature will remain the same no matter how many fans are installed.

I need to exhaust the excess heat from the window a/c I installed.