Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

SPACEpak blower fan runs constantly.

Options
Fan runs constantly even when thermostat is offbor unplugged.

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,616
    Options
    Sounds like a short in the wiring or a relay or contactor that is mis wired or stuck closed.
  • PC7060
    PC7060 Member Posts: 1,173
    edited October 2023
    Options
    What model and series?  I recently had a sticky/stuck TE solid state relay on spacepak 2 stage blower main board (upper right corner) .  New relay fixed the problem. Downside is having to pull the board to make the repair. 


  • mattmia2
    mattmia2 Member Posts: 9,741
    Options
    Are you sure that's solid state? it looks like a pretty standard electromechanical relay to me.
  • ratio
    ratio Member Posts: 3,649
    Options
    Am open limit could make the blower run continuously as well.
  • PC7060
    PC7060 Member Posts: 1,173
    Options
    mattmia2 said:
    Are you sure that's solid state? it looks like a pretty standard electromechanical relay to me.
    @mattmia - you are correct.  Don’t know why I said solid state.  I tested that it was sticking by tapping it with a screwdriver. That’s not something a solid state would respond to.
    mattmia2
  • JUGHNE
    JUGHNE Member Posts: 11,075
    Options
    Soldered in relay, you simply changed that?
  • PC7060
    PC7060 Member Posts: 1,173
    Options
    JUGHNE said:
    Soldered in relay, you simply changed that?
    Yes, we have pretty good soldering stations at my work. 
  • mattmia2
    mattmia2 Member Posts: 9,741
    Options
    PC7060 said:


    JUGHNE said:

    Soldered in relay, you simply changed that?

    Yes, we have pretty good soldering stations at my work. 

    You could do it with an iron in a fire if you had to.
  • HVACNUT
    HVACNUT Member Posts: 5,863
    Options
    mattmia2 said:
    JUGHNE said:
    Soldered in relay, you simply changed that?
    Yes, we have pretty good soldering stations at my work. 
    You could do it with an iron in a fire if you had to.
    I couldn't. 
  • PC7060
    PC7060 Member Posts: 1,173
    edited October 2023
    Options
    mattmia2 said:
    JUGHNE said:
    Soldered in relay, you simply changed that?
    Yes, we have pretty good soldering stations at my work. 
    You could do it with an iron in a fire if you had to.
    Not I, too many irons there already!
    JUGHNE