Expansion valve stuck open

The TXV and the FOT, or fixed orifice tube. The major difference between the two devices is the . Just because system pressures are low and you have warm discharge air, does not mean you are low on charge! Refrigeration Expansion Valve Theory - Duration: 18:16.

F is normal temp rise) I followed the testes outlined here.

My TXV being heated (by hand) or frozen in ice water produced NO CHANGE in suction or discharge pressures, Temps remained the same.

The condensor seems to be working alright, as it drops the temperature of the line to about 115F.

Trash in expansion valve or screen. This is because the expansion valve will get stuck and fail to open. Sticking or Jammed Air Conditioner . Expansion valve stuck in closed position, clogged with debris or restriction in the liquid line. High low side, normal high side.

Hot water valve (heater control valve) trickling hot water into heater core causing AC plenum to get warm.

Open seam on evaporator case drawing hot air from engine . Video for Licensed HVAC Professionals ONLY, Please do NOT attempt any Procedures without Professional HVAC Training. I live in las vegas where throughout summer the temperatures reach 1daily. Insufficient refrigerant in system.

I just wanna kno how many people have replaced there Expansion Valve ? Things that can go wrong with expansion valves and orifice tubes. Loss of proper metering ability due to wear, or an internal failure. Of course, any of the above conditions could . Loose expansion valve, Tighten valve.

Overcharged system, Remove some refrigerant.

Compressor reed valves, Replace reed valves. Leaking head gasket on compressor, Replace head gasket .