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  1. #1
    Join Date
    Feb 2011
    Location
    Georgia
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    686
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    3ton Raheem hp CRAZY

    Just left a comp change out on a 3ron rheem heat pump scratching my head. After putting the new compressor in and pumping it down I started adding refrigerant. Then I turned it on and as I watched the gauges the head would never rise above 120psi and when I closed the suction side of the gauges to check the pressure it would never go above 5-10 psi. Comp got really hot So I turned it off and I'm calling a tech tomarrow. Anyone seen anything like this

  2. #2
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    5,681
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    need more information. yea ive seen it before too. a slammed shut txv caused it...but like i said we need more information if you want us to diagnose it

  3. #3
    Join Date
    Jan 2011
    Location
    Boston, MA
    Posts
    461
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    Calling a tech? Don't take this the wrong way but what are you then?

  4. #4
    Join Date
    Feb 2011
    Location
    Georgia
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    Thread Starter
    Quote Originally Posted by gravity View Post
    need more information. yea ive seen it before too. a slammed shut txv caused it...but like i said we need more information if you want us to diagnose it
    How did you find out it was the txv

  5. #5
    Join Date
    Jul 2006
    Location
    Prata di Pordenone
    Posts
    7,560
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    Did you switch from cool to heat or heat to cool ,did you weight in the refrigerant .looks like you will find what killed the first compressor ( if it was bad )

  6. #6
    Join Date
    Dec 2010
    Location
    New Orleans
    Posts
    1,012
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    No answer, I guess he is a diyer.

  7. #7
    Join Date
    Feb 2011
    Location
    Georgia
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    686
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    Thread Starter
    Charge is weighed in. I did switch it back and forth and opened up the indoor coil txv to look at the dist tubes. This does look like what burned the other comp up. I also made sure the valves flowed freely. So the only things left are the txv's or outdoor coil somewhere

  8. #8
    Join Date
    Nov 2008
    Location
    DFW,TX
    Posts
    4,090
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    Many times ive come across this, come out, failed compressor, swapped compressor start-up immediately showed a restriction and i knew it was the txv. Changed it out for more money and moved on..

    I now have apolicy to inform customer that there may be other issues that caused the compressor to fail but wont know until compressor is replaced and additional costs and diagnosis maybe involved. covers my butt now...

  9. #9
    Join Date
    Sep 2011
    Location
    Augusta, ME
    Posts
    135
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    I now have apolicy to inform customer that there may be other issues that caused the compressor to fail but wont know until compressor is replaced and additional costs and diagnosis maybe involved. covers my butt now...[/QUOTE]

    That is the first words i say to the customer when i hand them the estimate to replace compressor.

  10. #10
    Join Date
    Feb 2011
    Location
    Georgia
    Posts
    686
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    Thread Starter
    Just swapped the outdoor txv. Still doing it. Temp diff across the rev valve on the discharge line is 20 deg. It's 64 deg outside. Does that sound normal.

  11. #11
    Join Date
    Oct 2005
    Location
    Pacific Northwest
    Posts
    2,358
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    Quote Originally Posted by chrisevansac View Post
    Just swapped the outdoor txv. Still doing it. Temp diff across the rev valve on the discharge line is 20 deg. It's 64 deg outside. Does that sound normal.
    Open the LL SV

  12. #12
    Join Date
    Feb 2011
    Location
    Georgia
    Posts
    686
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    Thread Starter
    Lol. I'm changing the indoor txv Monday. Discharge pressure is still 150. Temp off the comp is 145. Suction is 5 psi

  13. #13
    Join Date
    Jan 2004
    Location
    Here and there
    Posts
    4,812
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    One txv is used in each mode the other is bypassed. Maybe save some time next go around

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