Never worked on HVAC before, but through this video, I was able to diagnose and fix the issue. 3 wires were so old they had Roman numerals on them. Replaced them and done! Thanks!
@b-2466
3 жыл бұрын
I'm about to finish my second semester of school for hvac. This channel helps so much.
@joejesko7410
3 жыл бұрын
Shorted wires are probably the most common, but I had a system recently that was blowing fuses because the contactor was bad. Very low resistance (ohms), so basically it was shorting out. Easy fix once problem was diagnosed.
@austrianpainterhidingfromt5920
2 жыл бұрын
I'm learning the tech side after having been an installer, and that just happened to me last week. I opened up the air handler to find a pile of blown fuses laying in there, apparently is was a chronic issue. When I put a new fuse in, the relay in the AHU made this strange clicking sound, I thought maybe the relay was bad, replaced it, same thing. I ended up checking the contactor on the condenser and it read only .2 ohms, replaced that and everything started up fine. I don't know why the AHU relay was clicking but my guess is that sporadic low voltage from that contactor beginning to short was clicking it on and off.
@baitcasterdisaster8981
3 жыл бұрын
I’ve ran into a low voltage fuse that was blowing intermittently and it was quite humbling. I had 2 call backs before I ended up pulling a new wire to the outdoor unit and I haven’t been back since. Each time I visually inspected everything and isolated all low voltage circuits but couldn’t find it so I put a new fuse in and when I left it was working. Then a few days later I’d get a call back it was very frustrating
@loganguzman6856
2 жыл бұрын
Awesome video best I seen! Congratulations and thank you for helping us out!
@nhattuygiaithiensaunguyen9885
2 жыл бұрын
Thank you so much your video help me learned a lot
@TeslaBoy123
2 жыл бұрын
Thanks for sharing this 👍
@turbo12v
3 жыл бұрын
Hi I have a new heat pump installed 2 yrs ago (Carrier) I didn’t pay attention until this past winter season in FL,that my unit doesn’t turn outside on heat mode,just the heating strip in the air handler unit. It’s a heat pump ! I look at the reversing valve on condenser to make sure they install the correct unit. But it won’t reverse anything at all! I think it’s the thermostat,but I would like to get a second opinion to see what else besides the thermostat I can start looking at. Thanks
@repeatman
11 ай бұрын
I would check and see if the reversing valve wire is hooked up. If it's not on some units it won't reverse the flow of refrigerant.
@paisaconstructiondavid1964
2 ай бұрын
Muchas gracias, if I understood correctly an E fuse is 3.5 amp?
@uticany1
2 күн бұрын
We installed our ac unit last year. Since installation, fuse blows every time when we switch thermostat from off to cool however, if we keep the AC unit on cool it works great so in order to shut the AC, we have to raise temperature on the termostat Fuse only blows if shit the thermostat off and then turn the AC on. What could be an issue?
@mikekaufman8062
Ай бұрын
My AC FAU doesn't come on and upon opening the lower access to the wiring, it is an old system that uses a 6 pin relay to control circuit. The observation is that the wires on the relay, had fire damage to the Blu & Black wires, top two pins. How do I check the relay function and any other wiring problems causing this?
@ncooty
6 ай бұрын
@3:05: No need to remove the fuse to check continuity. Just touch the probes to the top contacts.
@jandshatton331
3 жыл бұрын
I just saw this. The last tech didn't put the capacitor back in the clamp and left it dangling. Eventually it made contact with the wall and shorted the fuse out
@arielhernandez2911
3 жыл бұрын
This is great man
@geekedbot5784
3 жыл бұрын
Why would the transformer blow before the fuse ? One of the outdoor fan wires came out & I put it back in place. Once I turned the unit on the transformer was done. Why ?
@nakiapringley5391
2 жыл бұрын
Awesome video 💯💯💯💯💯💯
@michaelcostello6991
3 жыл бұрын
Is low voltage usually AC and not DC ? Do we come across DC often. Thanks for great video
@jmac213stuff
3 жыл бұрын
What the proper amp/volt rating for 120 and 208/240 v systems? Are they all rated for 24v?
@monteglover4133
3 жыл бұрын
Be extremely careful when testing voltages to ground you can often get improper voltage readings
@andresperez-wc8ty
3 жыл бұрын
Shorted coils are a source of shorts, i always check
@migosmadeira9892
3 жыл бұрын
I have a 35 yr old Bryant air handler , there’s no circuit board and I can’t find a 3 amp fuse. What happend was I bypass the thermosthat with a paperclip, in the proccess , I think I shorted something the AC won’t run. If I can’t find a fuse , any suggestions which part is shorted? The AC was working before I did the bypass.
@jeffreylamelas8102
3 жыл бұрын
Yes please call your local HVAC company
@jasonkinney8129
3 жыл бұрын
Call a tech.
@josephfarrow2685
3 жыл бұрын
Those old air handlers did not have fuses. You probably shorted the transformer
@CommonTerryComedy
3 жыл бұрын
Did you use a plastic paper clip? That’s crucial...and definitely a red one.
@donnierobertson3088
3 жыл бұрын
Ok
@chuckdearruda6271
3 жыл бұрын
👍🏽
@pathannold6150
2 жыл бұрын
Heat blowing cold o
@danmartens1282
3 жыл бұрын
Can a thermostat with batteries installed and c wire connected cause fuse to blow.?
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