134A reach in cooler problem

[bvis]

Newer cheap 2 door worked fine 3 yrs, now too warm;dirty condenser-blew out;sealed system, hermetic compressor, no access valves, cap tube; searched-no leaks; compressor hot, discharge line hot, evap cold but not enough; no noticeable temp change along cap tube, no icing; I suspect partly plugged cap or oil return problem (condenser below). Tomorrow I will go back with tap in valve and recover, blow out cap tube,pressure test, change dryer; recharge.
134A is a pain.

[dogma]

did you check the thermostat? Is it positioned correcty and is it switching at the right temp?

[bvis]

Thermostat is at cold limit, and I can hear it click..box running at 53 degrees. Stat looks ok.

[jpz06]

Hi, This is my first post so there may already be an answer to this. I have been dealing with this problem for a while on new 134 a systems (cap. tube) the problem is with the poe oil that is in the compressors. what I do when I have a plugged cap tube (134-a) is replace cap tube , blow out lines, replace filter dryer, and very important change oil in compressor, some how the oil in the compressor breaks down when the compressor overheats (plugged condenser ) if you break open the cap tube can see like scale forming inside.

[william_wye]

we have had similar and numerous problems with reach in coolers, where cap blocks up...... The problem is with the POE oil.....How to prevent this from happening??? Someone said keep unit well maintained..(clean and clear condensor coils)..tried that ..to no avail.....Anyone got better solutions?

[nike123]

we have had similar and numerous problems with reach in coolers, where cap blocks up...... The problem is with the POE oil.....How to prevent this from happening??? Someone said keep unit well maintained..(clean and clear condensor coils)..tried that ..to no avail.....Anyone got better solutions?

Maybe to change capillary with other of bigger bore and longer.

[Slatts]

Hi bvis, does the compressor have a run capacitor?
A crook run cap will cause your compressor to run hot and possibly cycle on its overload, causing the case to run warm.
It should be within 10% of the capacitance marked on the cap.
If you do have to replace it, you can use a cap of greater voltage rating, but not less.
Just a thought.

Edit: by the way, even if the capillary is restricted, it could still be caused by a faulty run cap causing the compressor to run hot and cooking the oil.
Or it may just be that dirty condenser.

[Gary]

I see no reason to suspect the cap tube.

For that matter we haven't been given enough information to suspect anything.

[chancie owens]

Newer cheap 2 door worked fine 3 yrs, now too warm;dirty condenser-blew out;sealed system, hermetic compressor, no access valves, cap tube; searched-no leaks; compressor hot, discharge line hot, evap cold but not enough; no noticeable temp change along cap tube, no icing; I suspect partly plugged cap or oil return problem (condenser below). Tomorrow I will go back with tap in valve and recover, blow out cap tube,pressure test, change dryer; recharge.
134A is a pain.

on 134a the oil breakes down if the condensor gets dirty,plugs the dryer and cap tubes, you realy have to keep the condensor clean poe oil just isnt very good.

[Brian_UK]

Also, OP Bvis hasn't come back since January 2006 - I think perhaps we are wasting our answers here....

[ticotech]

get some piercing valve and check pressure, so we can have more info

[Slatts]

Also, OP Bvis hasn't come back since January 2006 - I think perhaps we are wasting our answers here....

Well....
That was kind of embarrassing.