TXV in door and out door testing

[Guest]

hi,   we install amana central air systems for our customers. but I'm sure there isn't much difference's in testing preciser. can some one lead me to some printable info on how to properly test TXV valves in the field? 

[ACtechGUY]

Learn ALOT more about "Superheat" and "Subcooling" in relation to air conditioning.

When you have a good understanding of these concepts, then you will be able to quickly diagnose TXV and many other refrigeration problems.

TECH NOTE : In regards to "SPORLAN" txv's.

The POWERHEAD's tend to rust out and loose their "sensing" charge(This does not mean that any r-22 or r-410a refrigerant has gotten out of the system, because these two parts are not connected so system pressure can't leak out with a powerhead leak.) What results is either a low or very low suction pressure (for no good reason) or a total pumpdown condition. The powerheads can be replaced very quickly at not much cost, but you need a special super skinny 'pipe wrench' used for sink repairs :> I ALWAYs insulate the new powerheads with corktape or rubbatex to prevent the next one from rusting out.