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.

Thermostat Voltage

thewiseguy13
thewiseguy13 Member Posts: 1
edited December 2017 in Gas Heating
Lennox GSR14 Pulse. LPG. 60% in tank. Nothing is happening at furnace. No clicks, hums, nothing.

120 volts in. I have approx 29 volts across R and C but have approx 14 volts across W and C at thermostat terminals. Also checked at terminal strip in unit with demand on heat.

I replaced the transformer and the results are the same.

Earlier, while out walking my dog, I heard a loud pop so I assume a fuse on a pole blew somewhere. When I got home, there was no power. Local utilities were seen shortly and then power was back on shortly after that. Curious if this caused a problem with my Gas Energy Inc controller.

The secondary limit was tripped but resetting it did not help.

Thinking about jumping R to W but didn't want to try until after hearing something from the forum.

Thanks in Advance.


Comments

  • FragWeg
    FragWeg Member Posts: 1
    Man,it can be a defective one.
    basic:
    "Never buy Lennox, they're junk.
    Never get insurance from Allstate, they lie.
    Never deal with companies based in Texas, they'll rip you off."
    "Work like you don't need the money. Love like you've never been hurt. Dance like nobody's watching."
    Satchel Paige
    My current jobbeard
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    FragWeg said:

    Man,it can be a defective one.
    basic:
    "Never buy Lennox, they're junk.
    Never get insurance from Allstate, they lie.
    Never deal with companies based in Texas, they'll rip you off."

    That's a lot of opinions in your first post. Why so angry?
    -Never had a problem with a Lennox, besides the usual problems with any brand of equipment
    -Have had Allstate for 25 years, never had a problem with claims.
    -Have done business with a number of companies in Texas...never been ripped off.

    To the OP, it is possible something could've fried a component or two. It's imperative to get a qualified tech out to check every component, and all the safeties, to ensure you system is operating properly.
    It's bad enough if something was fried and your furnace won't run.
    It's worse if your furnace runs, and won't shut off due to a defective safety/limit.

    There was an error rendering this rich post.

  • mikeg2015
    mikeg2015 Member Posts: 1,194
    Lennox Pulse had a reputation for various issues.

    But sounds like something is fried in the control board to cause voltage to bleed off between W and C.
  • HVACNUT
    HVACNUT Member Posts: 6,333
    edited December 2017
    > @FragWeg said:
    > Man,it can be a defective one.
    > basic:
    > "Never buy Lennox, they're junk.
    > Never get insurance from Allstate, they lie.
    > Never deal with companies based in Texas, they'll rip you off."

    What??? Care to elaborate or your just mad you lost your Hello Kitty lunchbox?
    @thewiseguy13, if a limit tripped, it did it for a reason. Call a pro. Might be time for an upgrade. Lennox makes a great 2 stage 90+ furnace.
  • Big Ed_4
    Big Ed_4 Member Posts: 3,020
    Disconnect W from the board and check W-C voltage again

    There was an error rendering this rich post.

  • unclejohn
    unclejohn Member Posts: 1,833
    Or better yet disconnect all the low voltage wires from board and jump R W and see if it fires up. How do you know the limit was tripped. Did the button "click" when pushed.
  • DZoro
    DZoro Member Posts: 1,048
    some of the old pulses have a delay timer and a contactor inside one or the other could be shorted/welded.

Categories