How to check superheat on txv with pictures
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If you get zero degrees superheat with a. Detach your txv's sensing bulb and submerse completely into crushed ice. On txv systems with high superheat, be sure to check the subcooling as refrigerant is added.
Carrier used to call txv's constant superheat valves, because that's what they do.
Check the evaporator coil and remove the txv's sensing bulb from the suction line.check the subcooling, superheat and pressures again. The sensing bulb should be properly connected to the suction line and insulated. Since this is an article about txv’s, i will now create a hypothetical scenario to continue with the troubleshooting steps to diagnose a thermal expansion valve properly. In order to determine the target superheat.
