Ok as far as the title goes, it would be the answer to this question I have:
About 2 months ago my tenants called me that the AC wasn't cooling, so I called the company I always use and sent them out to my house and look at the problem, tech called me later and told me the freon lines were frozen and that the evap coil had to pulled and cleaned. The system wasn't cleaned in at least 2 years so I told him yes pull it and clean it.
So they did that the next day, and the system worked for about a week or so, which then the tenants called me again and let me know that the air coming out the vents wasn't cool anymore.
So, I called my tech again, I said well I know you guys just cleaned the coil so there can't be any blockage there, so can you figure out where the culprit is this time? Well the 2 times one of the techs came by there he couldn't find anything in the unit, that everything looked ok, freon was good on load etc, that it seemed to be working just fine, which is true but only for part of the day after it has been running for a while it freezes up.
So after some back and forth calling getting the tech out there again because I told them the problem is still persisting every single day, the tech tells me he thinks it's the txv valve, and I say ok that makes sense, so go ahead and replace it. Day later tenant calls me again the AC is not blowing cool air, so it's freezing again. (after the coil had been cleaned it only froze at the coil, not the whole freon line, by the way) so I have that tech call me again to explain to me what he think's is going on and the only thing he can think of is that there is a blockage in the evap coil that causes the lines to freeze after some decent runtime.
So I am left with a decision, use a sledgehammer and get rid of the air handler and replace it or try to fix it one more time with a new evap coil? I suspect they have done something wrong as well because the freezing issue became more apparent after they cleaned the evap coil and put it back in.
Should I hold them accountable? Should I call in another company for a second opinion?
I have never had so many issues popping up with a unit before ever in my life, and now it's happening to me I'm getting so overwhelmed by what am I to do now.
Edit: Also a question regarding the heat pump. because there is no efficient way of testing in Texas right now to have it running for a couple of hours to see if it keeps working, can you HVAC techs tell me that the heat function by the heat pump wouldn't be affected by this so called blockage? It would affect my decision in keeping the unit as is right now for heating and looking to window units for a source of cooling. Already spoke to my tenants about this and they are fine with whatever I decide with. At this point I am just scared to replace the air handler, or "fix the evap coil" and then find out the problem has always been in the condenser instead, I would be mortified.
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