Multiple Low Voltage Shorts Found on a Goodman Heat Pump Took Me Forever to Complete Repair🤯🤬 Pt.2

Not sure why they call them shorts, because this call took me forever.
This is the craziest call ever experienced to date. Not only because the unit head issue after issue to diagnose and repair but also the access was less than ideal. It was a 22 year old carrier rooftop package heat pump unit that needed two transformers, heat strips, fan control board, reversing valve coil, new thermostat wire ran, and zone board and to dampers.

This call really made me understand why everybody hates working on shorts on HVAC systems. Please let me know in the comments what was your worst experience on a short call.

Thanks for watching!

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[roberts]

Great job being persistent with tracking down all those issues. That’s a lot of components that were taken out by those shorts. Can’t imagine the repair bill for that call. Note to self don’t buy an older condominium that requires a crane to replace the rooftop unit !

[garza]

When I was in Hvac school my instructor spent a whole day training us how to find a shorted wire that he had Intentionally sabotaged . The process sucked and it left a really bad taste for finding shorts . The whole time I was like why the fuck don’t we just run a whole new T stat wire from the unit to the control board ? This was too easy ? Lol This was my thought process coming from a aircraft maintenance background ( F-22) .Back to your video . Thank you for sharing and good job on the fix .

[HVACGUY]

Bro, you’re getting close to 1000 subs.

[newsview]

Coming up on five years in my house and five years with a 3amp fuse blowing on a Carrier Purion heat pump, installed by a prior owner in 2014. Seems like the blown fuses occur on a seasonal basis (winter). We have had yearly service calls by a local tech who runs his own business (mentors young HVAC techs so presumably he knows what he's doing!). Fuse usually goes out when there is snow on the ground and knocks everything off line. First time it happened a transformer also blew when he came out to diagnose it. The prior owner must have been having issues because somebody had installed an over-rated fuse there (probably to keep it from blowing) and apparently had the (elderly) former owner change out the thermostat every year (judging by a box of household-related receipts we inherited). Every time we have the tech out the 24 volt wires meter out correctly. Last year we had another part replaced that involved some type of spring type mechanism that is responsible for relaying the signals from the thermostat (he said it was sticking) but a year later, the same deal. Three years ago we even had the wires from the thermostat to the unit pulled and entirely replaced. This past February the fuse blew again as the tech was putting the panel back on the outdoor unit so he re-did the connections thinking that the short might be located there. (Always says the wires look good otherwise.) A few weeks later the fuse blows again. We finally tell him that we're tired of having this issue reoccur every year and what can he do to make sure it is truly resolved. After a few minutes he says the short occurred in the yellow wire (inside) and re-did that connection (should the wire have been replaced instead?). We could be waiting until winter 2022/23 to find out if this repair resolved the problem — but rather than do that we want to do some investigation of our own. First question is, should we make anything of the timing? We rarely get any snow but it seems that the fuses blow annually when there is frost/snow on the ground. Could this indicate that the actual fault lies in the defrost cycle? Is there anything about how that cycle executes that could trip the 3 amp fuse if the defrost board, temp sensor or whatnot is faulty? Not sure if this is related or not but I'll throw in this last "clue": Our electric bills are excessively high despite it being a modest-size home. Back when the thermostat wiring was replaced we saw a drop in our electric bills from astronomically high in the summer to just "horrible", but not as much of a savings as we expected given that the house has newer double-paned windows, full insulation, weather stripping and whatnot. There was apparently a wiring problem that allowed the heat strips to run during the summer — but correcting that only dropped our $800+ summer bills by about $100. Is the excessive electric consumption possibly tied into all of this?