Page 1 of 4 1234 LastLast
Results 1 to 13 of 40
  1. #1
    Join Date
    Jan 2013
    Posts
    19

    Help! American Standard 18SEER

    This is one of those buddy deals over the phone so i dont have any info besides this..it's been in the mid 30's & raining and his 2 stage heat pump is froze so big at the top that the fan blades are hitting the ice. The rest of the condenser has no ice at all. He called the nearest AS dealer & they said dont worry about it that all of them are doing it bc of the weather. I havent looked into it & have very little experience with AS, just wanted to hear some thoughts.

  2. #2
    Join Date
    Jan 2013
    Posts
    19

    AS 18 SEER freezing

    This is one of those buddy deals over the phone so i dont have any info besides this..it's been in the mid 30's & raining and his 2 stage heat pump is froze so big at the top that the fan blades are hitting the ice. The rest of the condenser has no ice at all. He called the nearest AS dealer & they said dont worry about it that all of them are doing it bc of the weather. I havent looked into it & have very little experience with AS, just wanted to hear some thoughts.

  3. #3
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    Is water falling from the roof/gutter right on the top of the unit?
    Always here

  4. #4
    Join Date
    Jan 2005
    Location
    Emerald Coast
    Posts
    933
    .

    Heat pumps and freezing rain is not a good thing. Have them switch over to their aux heat
    until temps warm up and the sno cone thaws.
    ..
    Do not attempt vast projects with
    half vast experience and ideas.
    ...

  5. #5
    Join Date
    Jan 2013
    Posts
    19
    Was looking for a technical explanation. I already know that heat pumps suck and they have supp heat. But it shouldnt freeze enough to hit the fan blades if it was working properly.

  6. #6
    Join Date
    Jan 2013
    Posts
    19
    No but it has been steadily raining for 5 days. But that still doesn't explain the top few rows being all that freezes does it?

  7. #7
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    20,857
    Well... maybe

    Think with me: The fan sucks air over the coils... and blows this cold air out the top. In many cases, the temp of that air is below freezing. So where do you think the ice will form first?
    May be different on different machines...

    This is why I prefer a Demand rather than a Timer defrost board. They tend to catch this sooner... yet not defrost until it is needed.
    GA-HVAC-Tech

    Quality work at a fair price with excellent customer service!

    Romans Ch's 5-6-7-8

    2 Chronicles 7:14

  8. #8
    Join Date
    Jan 2013
    Posts
    19
    Ok, I'm going to think out loud so correct me when I'm wrong. "Freon enters the bottom of the condensing unit (evaporator in heat mode and coldest point of the cycle), absorbs latent heat until it becomes 100% vapor and continues out the top constantly gaining superheat (which would be its warmest point)." That's my thinking so now why would it only freeze at the warmest part of the process?

  9. #9
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,888
    Trane is demand. Mid 30s and pouring rain could cause weird things. Usually sensors are mounted low so could be that icing was so bad that the sensor detected a warm coil low down and stopped the defrost. I'd go on em heat and see what happens under normal conditions.

  10. #10
    Join Date
    Jan 2013
    Posts
    19
    They have 2 identical units put in at the same time. The other is on a different house a couple hundred yards away and it freezing evenly like normal.

  11. #11
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,046
    They need a good tech, that is not normal under any weather. Trane/Am Std with demand defrost almost never have defrost issues.

    I would start by thawing it out completely and then running it and observing the frost pattern.

  12. #12
    Join Date
    Jan 2013
    Posts
    19
    I am going to go check it for them when the rain stops. I'm new to this site so I posted it here to see if there was really any "techs" or "professionals" on this board. So far i've mostly seen parts swappers. Smh

  13. #13
    Join Date
    Mar 2004
    Location
    Chester County PA
    Posts
    371
    Heat Pumps don't "suck", it might be under charged if only half the coil is freezing up. If it has a defrost sensor it might be located at the other end of the coil and not reach the specified temp to kick it into defrost.
    It doesn't have to be a "AS" tech, it needs to be a competent tech.

    ~smoke~
    "That motor's done, he let the factory smoke charge out!"

Page 1 of 4 1234 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
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event