Page 1 of 3 123 LastLast
Results 1 to 13 of 27
  1. #1
    Join Date
    Jun 2009
    Location
    DFW, TX
    Posts
    1,533
    Post Likes

    How can this many things be wrong at once?

    Christmas Eve. 1hp Restaurant walk in cooler at 55f. I check evap for ice, totally clear, no cooling whatsoever. I find mechanical thermostat set at 25f yet was open. Clicked it on to confirm and hear solenoid click on and unit begins cooling. Ok... awesome, easy fix.

    I observe there is no defrost timer, so I put in a little timer and electronic thermostat to replace mechanical tstat that was bad. Fire it up. Unit is cooling but liquid line is a little too warm. Check suction, at 12# (r404a). Ok,,, it's low on charge. Recharge 5lbs and clear sightglass. Unit cooling great now, suction at 55#.

    Test defrost timer I just installed. Confirm it kills thermostat. Turn it back on...not cooling. Check suction at evap, 110#....ok compressor not running. Make my way back to roof. Dang LP switch is stuck. As in, I looked at the internal lever arm and it was forward like no pressure on it. Touch it and arm pops back and pressure switch kicks on. Ok...so pressure switch is also sticking open....

    How is it possible a single unit could have 3 separate issues, any single one of which capable of making the unit stop working??!?? 😕😕😕

    Sent from my SAMSUNG-SM-G890A using Tapatalk

  2. #2
    Join Date
    Jul 2012
    Location
    WA
    Posts
    2,579
    Post Likes
    It's frustrating when that happens, plus it can make the customer wonder if you know what you're doing when you keep adding parts to the repair.

  3. #3
    Join Date
    Jun 2009
    Location
    DFW, TX
    Posts
    1,533
    Post Likes
    Thread Starter
    Quote Originally Posted by Red Man View Post
    It's frustrating when that happens, plus it can make the customer wonder if you know what you're doing when you keep adding parts to the repair.
    Hell I was laughing reading my own invoice, cause if I read a coworkers invoice like mine, I'd have said "HACK" lol

    Sent from my SAMSUNG-SM-G890A using Tapatalk

  4. Likes Red Man, UmmScott, VanMan812 liked this post
  5. #4
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    9,516
    Post Likes
    This is where invoice writing becomes very important. Make it read like a short story starting from the time where you hopped out of the truck and walked in.
    The sites where everything is wrong/broken are very frustrating. Once had a fast food place call in a no heat for the dining room. This turned into a three day call which included all 5 RTUs at the site.
    These calls always seemed to happen at sites where absolutely no preventive work was done.
    “I haven’t failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison

    “It’s not whether you get knocked down, it’s whether you get up.” - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

  6. Likes Red Man, UmmScott, VanMan812 liked this post
  7. #5
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    4,715
    Post Likes
    I always say there was a short circuit that caused everything to burn up....i fixed it, its good.

  8. #6
    Join Date
    Aug 2013
    Location
    Omaha
    Posts
    2,887
    Post Likes
    Kinda hate those ones...

    I usually at least attempt to relate them together so it seems like issue A caused stress on component B and caused it to fail...and so on.

    Sent from my SM-N920V using Tapatalk

  9. #7
    Join Date
    Jun 2009
    Location
    DFW, TX
    Posts
    1,533
    Post Likes
    Thread Starter
    Regarding the invoice story writing, I was told to just write short description - fan motor failed, low on refrigerant, etc. I had previously been writing long stories that my office referred to as "novels." Boss said customer doesn't usually care, keep it short and sweet. So I save the novels for you guys now 😅

    Sent from my SAMSUNG-SM-G890A using Tapatalk

  10. Likes UmmScott liked this post
  11. #8
    Join Date
    Jun 2009
    Location
    DFW, TX
    Posts
    1,533
    Post Likes
    Thread Starter
    I suppose I could say that thermostat was primary failure. Unit was still slightly cooling being low on charge, so it could've been low for a long time. No defrost timer without freezing up? I suppose the LP switch letting suction get to 100# intermittently would've provided a random defrost here and there! Ok it all makes sense now

    Sent from my SAMSUNG-SM-G890A using Tapatalk

  12. Likes UmmScott liked this post
  13. #9
    Join Date
    Jan 2016
    Location
    The triangle in the Keystone
    Posts
    965
    Post Likes
    Atleast you stayed to check over the WHOLE system. Especially on Christmas Eve. Most guys would have jus replaced the stat and left.

    It's rare that I only fix the issue I was called for. Maybe a fan motor failed but what about the condition of the coils or the door gasket? A good tech addresses the entire unit.

    I write novels. Like, several paragraph novels. I include every temp/pressure/amp draw etc etc. I don't think my office particularly likes it but atleast no one has to guess at what I did.

  14. Likes sirweldalot liked this post
  15. #10
    Join Date
    Jan 2010
    Posts
    12,722
    Post Likes
    I like taking the person in charge or the owner and visually going around pointing out the problems. Seems to eliminate any confusion.

  16. #11
    Join Date
    Jul 2000
    Location
    Cuenca EC
    Posts
    13,301
    Post Likes
    If they complained about the multiple issues, I would just remind them I saved them a lot of money by fixing them all at once and not over four different service calls.

    I always wrote everything out in a novelette, chapter by chapter.

    Check out Icemeister's Back Room

    Read My Latest Rambling:
    What Is Mechanical Subcooling?

    ...and a new calculator:
    Nitrogen Pressure Calculator

  17. #12
    Join Date
    Sep 2002
    Posts
    22,730
    Post Likes
    Were there any 'tapping marks' anywhere on the found-to-be-defective components?

    PHM
    -------



    Quote Originally Posted by Red Man View Post
    It's frustrating when that happens, plus it can make the customer wonder if you know what you're doing when you keep adding parts to the repair.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  18. #13
    Join Date
    Apr 2005
    Location
    Australia : Queensland
    Posts
    1,575
    Post Likes
    LP switch most likely sticky due to the low pressure ,, had one yesterday doing the same thing after system was low on gas for 3months or more...
    Found a leak on the receiver fusible plug ,,, pretty sizeable on one of the condensing units for a milk vat ,,, then the 2nd condensing unit also cycling on LP has a leak on the receiver sightglass....
    The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman.

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.