Page 1 of 2 12 LastLast
Results 1 to 13 of 19
  1. #1
    Join Date
    Nov 2004
    Location
    Atlanta, Ga. burbs
    Posts
    281
    I just bought a 6 year old house and have noticed the lights dim momentarily when the heat pump starts up. I called the EMC power company and they sent a crew out to check everything including in the meter base as a courtesy to me. They said they checked the voltage as well. They gave it a clean bill of health. The crew chief called me and said they had been called out once before by the previous owner and had found nothing wrong with their side of the power hookup. He did offer that he has the same problem in his own home. In my last house that was serviced by an NON EMC power company I have never had this problem. The house has two panel boxes a 200 and a 100. I have not looked at the hook up to see if the 100 is a sub panel. It may be. The wiring is overhead if that matters not under ground.

    This was suggested to me so I would like to ask the HVAC pros if this could be the problem. I was told it might be the start-up capacitor and/or the system may be overcharged with freon. Someone also told me to check the grounding of the house. I do not mind paying for an HVAC tech. to look at the system if you all think it is money well spent. I would like to add that the lights dimming is very momentary and has not blown any breakers nor has it caused any issues that I know of to date.

  2. #2
    Join Date
    Jul 2005
    Posts
    7
    Scroll compressors are more prone to dimimg lights then recips. most manufacturers of hvac equipment make a quick start kit available for just that reason. you will have to call a service tech so he can install the right size one.
    good luck

  3. #3
    Join Date
    Aug 2002
    Posts
    490
    yes maybe not a good ground to the outside unit.
    you can have a tech come out and check your refrigerant charge, amp draw, ground to heat pump, breaker rating rating required for your heat pump and the disconnect box wiring, all wiring in outside unit.


  4. #4
    I would recommend that you call a highly qualified Electrician to come and inspect your power distribution system!

    There could be issues with your air conditioning system, but I would start with the power system FIRST!

    When I run into this type of problem it's usually a power supply issue.

  5. #5
    Join Date
    Jul 2002
    Location
    Slacking off right now
    Posts
    7,546
    The Electrican I knew advised me that allot depended upon how far you were from the pole transformer.

    Having said that My 3 ton scroll dimms the lights upon start up momenterialy too.
    As J said consult with a good electrican first!

    in one house I had a radial arm saw and the lights dimmed upon start up 120V even though I ran 8 guage wire (cause I had it) to the plug from the panel (16ft run)

    www.vetopropac.com - The best tool bags on the market - The offical tool bag of choice by techs everywhere

    Arguing with some people is like wrestling a pig - eventually you realise the pig actually enjoys it

    Gonads serve a useful purpose but are no substitute for brains

  6. #6
    Join Date
    Feb 2002
    Location
    Toledo,OH
    Posts
    142
    All heat pumps should have hard start kits on them thats what I think.

  7. #7
    Originally posted by dugfish
    All heat pumps should have hard start kits on them thats what I think.
    Even a scroll that has a crankcase heater installed?

  8. #8
    Join Date
    Nov 2005
    Location
    ontario canada
    Posts
    14
    did the power company check out the system neutral connections or ground at the pole and at your stack

  9. #9
    Join Date
    Nov 2004
    Location
    Atlanta, Ga. burbs
    Posts
    281

    answer to falltime

    did the power company check out the system neutral connections or ground at the pole and at your stack


    According to the crew chief they did check this out.

    What blew my mind was the crew chief said his HVAC does the same thing at his house. I have never ever had this problem before. I am a bit worried.

  10. #10
    Join Date
    Sep 2001
    Location
    Vancouver Canada
    Posts
    996
    Mine does as well, and many systems we install do the same thing. I don't think it is anything to be overly worried about. At least I know when the heatpump is kicking in. LOL
    "Go big or Go Home"

  11. #11
    Join Date
    Nov 2000
    Location
    Waco, Texas, USA
    Posts
    6,153
    Every compressor should have a hard start kit. Even scrolls wtih crankcase heaters. Reason is without a start kit too much stress is put on the run winding during start up.
    "And remember my sentimental friend......that a heart is not judged by how much you love, but by how much you are loved by others" - Wizard of Oz.

  12. #12
    Join Date
    Nov 2005
    Location
    Kansas City (zip 66204)
    Posts
    50

    Hard Start Kit?


    What is a Hard Start Kit? What is a Quick Start Kit? Is this something extra or is usually included in the HP?

    Doug

  13. #13
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453

    Re: answer to falltime

    Originally posted by west_seth
    did the power company check out the system neutral connections or ground at the pole and at your stack


    According to the crew chief they did check this out.

    What blew my mind was the crew chief said his HVAC does the same thing at his house. I have never ever had this problem before. I am a bit worried.

    The dimming lights would not be a ground or neutral problem, since they are related to the compressor starting.
    I am an electrician and I will tell you not to worry about it. Mine has been doing it for over ten years. You probably have a long run of wiring to the outdoor unit ( from the panelbox ) and you are getting a small voltage loss during compressor start-up. A hard-start kit could be of slight benefit, but may not eliminate the dimming lights. The only way I know of to be sure to eliminate it is to run larger wire from panelbox to outdoor unit.

    Richard

Page 1 of 2 12 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