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  1. #1
    Join Date
    Nov 2011
    Location
    Wisconsin
    Posts
    6

    Trane 16i Heat Pump

    Hello everyone, on a recent call I found the start capacitor blown on a Trane Heat Pump. I replaced all start components start cap Run Cap and relay. fired up unit and it ran fine checked amp draw amps ok. Heat pump made it 1 week and now the Start capacitor is bad again! Is it possible I got poor replacement parts? I installed the exact components that were originally in the unit as this particular heat pump was still under warranty. should I look towards the compressor or is it possibly the contactor acting up? Thanks for any advise.

  2. #2
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,062
    Quote Originally Posted by ArticFox918 View Post
    Hello everyone, on a recent call I found the start capacitor blown on a Trane Heat Pump. I replaced all start components start cap Run Cap and relay. fired up unit and it ran fine checked amp draw amps ok. Heat pump made it 1 week and now the Start capacitor is bad again! Is it possible I got poor replacement parts? I installed the exact components that were originally in the unit as this particular heat pump was still under warranty. should I look towards the compressor or is it possibly the contactor acting up? Thanks for any advise.
    What size unit?

  3. #3
    Join Date
    Feb 2012
    Location
    Virginia
    Posts
    34
    I would be extremely suspicious of compressor issues. Of course, I would rule out the obvious factors, such as overcharged, restriction, voltage spikes, etc. Is the start cap actually burning up, or just failing? Compressor may be requiring higher torque than usual to start. You can read start winding to ground with megohm meter for potential winding insulation failure, could be the compressor is getting ready to 'ground out'.

  4. #4
    Join Date
    Nov 2011
    Location
    Wisconsin
    Posts
    6
    @second opinion its the 2 ton 2 step unit

    @jpj13 Im suspicious of Compressor overcharge= not an issue as I installed this unit in 08 and am 100%sure charge is dead on. restriction could be possible but I'm thinking no at this point but cant be 100% sure till I get running and put gauges on... so could be possible. The caps are blowing out completely.

  5. #5
    Join Date
    Feb 2012
    Location
    Virginia
    Posts
    34
    If caps are blowing out completely then I suspect it's an issue with the compressor. I'm afraid your best bet here is replacing it.

  6. #6
    Join Date
    Nov 2011
    Location
    Wisconsin
    Posts
    6
    My thoughts also thanks for the help

  7. #7
    Join Date
    Feb 2012
    Location
    Virginia
    Posts
    34
    There are heat pumps in Wisconsin?

  8. #8
    Join Date
    Nov 2011
    Location
    Wisconsin
    Posts
    6
    Oh yes They were big years ago then they sorta died off but now with the better designs are starting to make a comeback. with the mild temps this winter they have been great. I have one customer with his set up and he uses duel fuel we have been playing with his set up a bit running his unit down to 9 F before switch over.

  9. #9
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,517
    16i is a scroll compressor witch puts little stress on a start cap
    before replacing the compressor i would check power problem causing short cycle or even guick on and off before the pot relay can cool off and drop out

  10. #10
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,062
    Quote Originally Posted by ArticFox918 View Post
    @second opinion its the 2 ton 2 step unit

    @jpj13 Im suspicious of Compressor overcharge= not an issue as I installed this unit in 08 and am 100%sure charge is dead on. restriction could be possible but I'm thinking no at this point but cant be 100% sure till I get running and put gauges on... so could be possible. The caps are blowing out completely.
    What was the part number?

  11. #11
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,845
    Did you check voltage across the cap?
    "The only true wisdom is in knowing you know nothing" Socrates

  12. #12
    Join Date
    Nov 2011
    Location
    USA
    Posts
    406
    Quote Originally Posted by ArticFox918 View Post
    @second opinion its the 2 ton 2 step unit

    @jpj13 Im suspicious of Compressor overcharge= not an issue as I installed this unit in 08 and am 100%sure charge is dead on. restriction could be possible but I'm thinking no at this point but cant be 100% sure till I get running and put gauges on... so could be possible. The caps are blowing out completely.
    Observation #1: original start cap failed. Observation #2: new cap failed after a week. No additional testing conducted. Initial conclusion: compressor faulty? I guess it's possible, but geeeze, that's a leap. Just the fact it ran a week directs suspicion away from the compressor, to my way of thinking.

    Start caps usually "blow up" because they stay energized for too long a time, which isn't a very long time. I'd be looking in that direction first.

  13. #13
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,901
    i did not think the 16i comes from the factory with a start kit. did you make sure it was the correct start kit that was installed before replacing it with the same thing ,

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