Introduction: Fix a Broken Furnace With Arduino
The control board in my furnace will not turn it on unless I manually turn the blower on. But when I do that the blower stays on until I manually shut it off.. So I built this to turn the blower on and off and also to override the thermostat.
I built this a while back out of necessity. I have not intended to make it an instructable so I did not do a step by step build. If you have any questions, please feel free to let me know, this is my first instructable.
Step 1: Collect Your Parts
First we need to collect some parts.
NPN Mosfet - FQP30N06L - $0.95
Solid State Relay SSR-25DA $2.55
Transistor PN2222 $1.95
Arduino UNO $24.95
3 X 100 ohm Resistors $1.49
Just shut off your thermostat and hook this up and you are good to go.
If you have any questions of comments let me know
Step 3: Upload Your Code
Participated in the
Arduino All The Things! Contest
5 years ago
well after 2 years of running the ac and heat we finally had to call the furnace guy. but it ended up only costing $125.00 to fix it, so everything is on the up and up.
7 years ago
I just got quotes on a new furnace. Fixing it seems like a much better option.
Reply 7 years ago
in my area its about $100.00 just to have it looked at. I didnt have to buy anything I already had everything I needed, i just put a parts list as an example.