Bad HVAC TXV Overview! And a Tip Not Even the Pros Know! 

Thanks pal!

Thanks pal!

How often did that happen?

@@bobboscarato1313 well from the few units I’ve seen compared to other tech it’s been every single one. The last one I seen was at my current work and the TXV is installed on the top go the suction line. Manual states it has to be installed on the bottom 1/3 of the line. So at the 5oclock position from what I gather.

Same. Crazy pal

Poor training is one reason that comes to mind.-

TXVs are misdiagnosed because of low refrigerant, air flow issues, and incompetence by techs all the time

Second opinion time!

For that price you can install a new coil with extended warranty!

It’s a dilemma. Pros deciding if they should invest more in themselves while customers think they make too much.

@@NewHVACGuide LOL...its all about pride in workmanship and doing the job as it should be done. Defineately not based on the boat and RV payments coming due. If work is done well, the money follows

Truth. Started for new commercial company. I am seeing some things are mind blowing.

Sorry if that was too much to ask. Maybe Brian at HVAC school would know and answer.

A couple things come to mind. Since it’s an orifice, I would rule out metering device. Noncondensibles, reversing valve, compressor valves, low-voltage issue are the first things I would check. Sorry, I didn’t answer your question right away.

@@NewHVACGuide Thanks Josh, no prob, I know how easy it is to forget about stuff for later, that's why I pinged you. I've not seen anyone talk about this happening before so it must be either unusual or people just aren't witnessing it because it's a long term monitoring situation. So from your list, the only thing on it that hasn't already been ruled out is compressor valves. It's a Goodman that's been running for 29 years so maybe it's time. It's been heating like a champ all winter, which I'm thankful for. I've never seen this ramping happen but then again this winter is the first where I've had a permanent thermometer installed to see duct temp at a glance of the readout on the wall. It's a great way to alert me that ice is starting to form on the outdoor evaporator. And I've been watching its behavior this season so this unusual activity caught my eye but I have no way of knowing if it's ever happened in prior years under similar operating conditions when I wasn't watching the duct air temp. The indoor temp was so close to the outdoor temp, and that was because I'd turned the system off while we were away for a bit. It worked surprisingly well when we had large temp differences inside to out, like 74 inside and teens outside. I was still getting duct air temps in the upper nineties. This warm spell has caused little to no need of heat so I haven't been able to watch its behavior since that time last week when it caused me concern. I'm thinking if it gets to where we need heat enough that it runs a while and I see the temp ramping up and down again, I should throw the gauge set on and watch for pressure ramping. Not that I'd then know what's causing it but it would be another clue I think. But the way the weather is going (and no complete about that) it probably won't come on much more this year. It's 77 in the house now and it hasn't run at all for a couple days. Appreciate you getting back to me Josh. Take care and enjoy!

@@elgringoec 29 years! Wow. I see so many people bash Brands, and Goodman always seems to be one of those brands that is polarizing. 29 years really says some thing though!

@@NewHVACGuide It's like you said earlier, Josh - companies change, the industry changes - change is the only constant. At that time, in '94, Goodman made units for five or six "brands" plus their own. My unit was bought straight from the factory in Texas, it has no external brand markings on it. It came with six or so labels in the doc pac for the purchaser to brand with. Presumably they'd be shipped to a dealer who'd apply their affiliate brand label. I just got lucky. It was built well with decent components and the only problem so far is the reversing valve getting stuck in heat mode about ten years ago. And I blame myself for brazing up my lineset without nitrogen so I likely introduced flaking and the filter/dryers maybe didn't capture it all. I really expected I'd have to renew the system sooner. And I'd'a done so if it weren't for all the flux surrounding the refrigerant scenario. I feel like I'm stuck in an uncertain world of limbo.

This is definitely a theme. I was lucky to find a couple gold mentors along the way, but my overall experience aligns with your assessment.