Diagnosing a restricted TXV on a Carrier heat pump in heat mode.

All right on this one She reported it short cycling And she also noticed that it said auxiliary heat So I'm thinking I'm thinking it was short cycling when it goes through defrost. I just disconnected that I'm gonna try to force it through defrost That's like we're starting to see a little bit of frosting on the coil. Let's see if it's cold enough to go through defrost. Going through defrost just like it's supposed to. I'll change the timer on this to change that from 90 to 30 minutes. Well, it ain't short cycling now. I'm going to give it just a second. All right, after letting it run for a little while, you see my head pressure is way up there. This is a 410 system, but still that's too high. I'm about to go in and see what kind of metering device we have, if it's a TXV close enough for me. I've done it. I put my high head pressure over here, a low suction on my liquid line, and look at the difference. There should be a slight difference, but nothing quite like that. So I've got a restriction in my TXV, and we'll put it in an estimate to replace that. That's what I suspected, but measuring my pressures this way is what confirmed it for me.