turbo air M# tsf-23sd S# df23212167 reach in freezer r-404a
I was doing a pm and found one freezer starting to to thaw out at 37 degrees before getting my gages I feel the cond coil feel room temp discharge line feel room temp and suction king valve coming off the compressor is on the warm side hmmmmm bad valves to make sure I go get my gages digi cools its running 5 low/ 199hi psig I had 6 degree subcool superheat had to be atleast 60 degrees didn't check it though. cap tube system no receiver. I unplug the cooler to see if it equalizes but pressure stays right there. so I thought maybe my gage was stuck I loosen my low side hose from the manifold then tighten pressure dropped to 3 psig and it held there I loosen it and it drops to zero I plug the unit back in and the low side hangs at .3 psig seems like the compressor isn't sucking much but then if the valves were bad it should equalize through the bad valves once turned off. on the other hand if the compressor was pumping my discharge would be hot and my suction should go into a vacuum depending how bad the restriction is. maybe originally the cap tube was clogged and it caused the compressor to mess up not sure looking for your input. by the way I went out to get my analog gages hooked up lowside and it hung at about 2 psig if it was on or off it would stay about the same. the only other thing I can think of is if this model has a liquid line solenoid valve gizmoes im starting to see on reach in coolers that prevents the refrigerant from all condensing in the evap coil. if it did it must be up in the evap section.