Air Conditioner doesnt blow any air - how to fix AC blower - HVAC control board replacement

So amazingly quiet and Fastly.Cool in my room! 42db is at a whisper level. I bought 2 and installed myself.Very sturdy bracket and easy to adjust to fit windows of different size. Absolutely fabulous units!!

Outstanding. First I called Nest and they told me to measure voltage from Nest base between Red wire (supply) and Green wire (fan) 28Vac so wring is good, then twist together red and green, wait 3 minutes, fan no start so problem is in HVAC unit. I started checking capacitor as it is the most likely cause but uF reading was close enough. Then used used your very smart tip to test fan directly with the door switch. Fan motor OK. So ordered circuit board on eBay. Meanwhile I spliced 3 ways so the door switch supplies both the circuit board plus directly the orange wire to the motor. So now the house temperature is controlled with the fan blowing non stop until I replace the bard. Family is happy. No astronomical bill! Your video saved my day!

Don't know how to thank you. Old 20+ y.o. Goodman unit. Followed your instructions from the beginning - capacitor check, fan motor check and the same thing - board was shot ( didn't have any current between fan and neutral). Got a new board from supplier , changed it in 20 min and it runs great. THANK YOU !!!!

Dude thanks a ton for this vid. I was able to trouble shoot my inop AC to a bad blower motor capacitor. Cost me $10 to replace. And saved me $200-$300 for a visit plus labor from an AC company. AC is running perfect so I can enjoy my Memorial Day weekend.

I like how you used the door switch connector to troubleshoot the fan. Good tip!

OMG, the AC guy just left and ball parked me $2000-$2500 to replace the control board and $6k-$12k to replace the entire furnace system. Thank you for posting this. I feel comfortable in troubleshooting and replacing the CB.

Great job done here! Thanks for getting to the point quickly and your very accurate on step by step directions. Thanks a bunch my friend!

I followed the troubleshooting step by step and had a bad control board. Found one for $140 and afraid to find out how much I saved by DIY. The only exception was the new mounting holes didn't match the old ones. I cut a 1/4" piece of plywood as an arc/ short buffer behind the board and used drywall screws to complete the mounting. Great vid and tips!!

Excellent diagnostic skills. I'm an auto tech and this video helped me understand more about my home AC. Fixed my problem too. THANKS

THANK YOU SO MUCH for this video. I followed these steps and found that my control board was bad, too. The differences are that my control board doesn't have an LED and my pressure switch is wired backwards (with no label). In addition to taking pictures, I moved the wires from the old board to the new board, one at a time. I unmounted the board with all the wires in place. I mounted the new board under it, then move the wires over on at a time, starting from bottom to top. My capacitor is off by more than 5% so I'll replace that in a couple of days when the new one comes in the mail. NOTE: It wasn't mentioned but the white neutral wire needs to be re-connected before testing with the pressure switch.

Thank you for taking the time to make and upload this video. It gave me the confidence to try and fix it myself, which I did. Many blessings to you sir!!!

This saved my sanity. My old thermostat went out. I installed another but the fan was still not running. When you said the green wire goes to the fan, a light bulb went on. I rechecked the wiring and sure enough the green was not inserted properly.

not fair, you have three hands . I only have two.

This is a excellent video for any person that knows just a little bit this person did a great job explaining things . I use a close pin for the safety switch if I don’t have help

This was very helpful, my control board went out on in the middle of the summer with intense humidity. I added a double spade connector to the door switch power out (power line to the board). I then pulled the spade connector off the control board that powers the fan (black wire for me), and connected it the new double spade connector on the door, and left the other power out going to the control board. I then jumped my Red and Yellow which bypasses the control board and calls for AC. I now have AC running nonstop until my new control board arrives later this week. Ill wouldn't recommend leaving this on 24/7 but its an emergency solution that works.

Nice video. Sometimes the relays are clicking but the contacts a not working anymore (worn-out) because the relays used are barely strong enough for the current surge of the motor. I usually change those relays with higher rating ones. Also sometimes the soldering traces are cracked because now-days they use lead-free solder that is more brittle...

Great start at troubleshooting. Helpful, but missed an important option when troubleshooting. Like in the video, I connected the hi-speed wire to the door switch and the fan came on, so I ruled out the motor and did all sorts of other troubleshooting. BUT, I should have done the same routine with the mid-speed (blue wire) and lo-speed (red) wire. I later did this and learned that the motor was bad even though the hi-speed worked. By trying each of the three speeds, you can definitely rule in or out a bad motor.

Sir, WOW this post spoke exactly to my problem and I was able to get the fan started. Thank you! My issue know is the thermostat is calling for AC and the compressior isn't coming on. It's always something...by AC dude is coming out and will be able to make final recommendations. Either way, this video was awesome and exactly what I needed to hear in order to solve my problem!

Great info, helped me diagnose my system and now I just need to find a control board. Thank you very much!!

Great video for someone new in the busines like me thanks so much keep them coming please