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Need some AC advice/help EXP VALVE FIXED!!!!!!

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Texas275 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Texas275 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 12:53pm
I don't know the temp going in; I'll have to check it when I get home.

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mstrcrftr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mstrcrftr Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 1:31pm
its the compressor..  no pressure coming out means no suction in..
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Texas275 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Texas275 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 6:00pm
Today static right at 90 ambient temp 90
Both high and low at 90 psi when running. 
Used laser thermometer on metal hose going in 70 deg 
Vent 60 degrees. 

Doesn’t look like much movement of the Freon. Does that point at compressor?


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Heavy 488 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 6:11pm
Close the suction valve and see if it climbs. 
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Texas275 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Texas275 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 6:58pm
Both high and low side at 100
Close low side gauge it drops to 35 high goes up to 150
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Heavy 488 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 9:32pm
so the compressor went to 150. this should rule out the compressors inability to pump up.
this still takes me back to the expansion valves inability to throttle.
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Texas275 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Texas275 Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 9:57pm
Ok, I'm gonna start with an expansion valve.  If I'm going to throw a part at it; it's best to start with the cheaper part.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: May/06/2020 at 11:30pm
Originally posted by Heavy 488 Heavy 488 wrote:

what's the temp coming into the evaporator?

I was thinking the same thing. A better measure of A/C is temperature drop, inlet to outlet. A temperature drop (difference) of 40 degrees F is good I think. But sounds like something else is wrong.


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401MATCOUPE View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 401MATCOUPE Quote  Post ReplyReply Direct Link To This Post Posted: May/07/2020 at 5:19am
If you are getting to no delta temp drop and pressures stay near equal....that usually means the compressor has failed internally, Sanden's have known issues with that.....another clue if the suction side is not low (30-45 psi) when running and high side is not up.....expansion valves do not like any debris in system.....and they do fail, both wide open and closed.
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Texas275 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Texas275 Quote  Post ReplyReply Direct Link To This Post Posted: May/07/2020 at 11:36am
I think my best course is to start with the expansion valve.  If it's not that, I'll get me another compressor.  
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