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goodman central ( GSZ140301 ) 14 Sheers , 2.5 ton

sendi_t34
sendi_t34 Member Posts: 3
edited December 2023 in A-C, Heat Pumps & Refrigeration
Hi Guys, today I was trying to install a new thermostat , and unfortunately, the while I was doing it the unit power was on.


now thermostat shows no power :(

and circuit board on blower fan , the red blinks 6 ( six ) times , I looked up and it looked like rollout/flame out swith.

I think I have 2 switches, I tried to reset it multiple times, but flame still not coming up.
the blower fan/motor turns on.. it looks like everything turns on except for the burners.

tested the continuity on these switches and it is there, shows 0 volts across switch terminals and shows 0 ohms on the switch.

switch design/construction is too poor -- you can't really say it is reset or not, there is no clear click

This was working fine right before this..

It might have touched Y wire to G termnial, but fan seems to work fine. I am not sure.

any suggestions?

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,298
    Hard to say. I would kill the 120 volt to the furnace which should reset the control. Then see if the light blinking goes away when you power it back up. If the blower fan runs then I assume the fuse in the control board is ok.

    Unless this is an old furnace with natural draft and is induced draft the inducer motor starts first and when the air proving switch make the gas valve should open and it should fire if the other safeties like high limit roll out etc are made.

    I would disconnect all the thermostat wires at the control board to eliminate a stat problem. Put a jumper on r-w (with the power off of course) and start from there. You can always jump a roll out or limit FOR TESTING ONLY DON"T RUN THE FURNACE WITH ANY JUMPERS IN PLACE OR WITH ANY CONTROLS DISABLED.

    To check continuity of a roll out or limit remove both wires. Sometimes on continuity you can get a back feed through another control.

    Hope this helps.

    If you can post the wiring diagram that may help if you don't have any luck.
  • HVACNUT
    HVACNUT Member Posts: 6,242
    Is there a C wire connection at the thermostat? If no, then you probably didn't short anything. 

    You would definitely hear or feel the click if you had to reset a rollout switch. 

    Like mentioned, turn down the thermostat and turn off the power at the switch for 5 minutes, then turn on and raise the thermostat above room temperature. 

    If it doesn't go through its sequence, and the code pops up again, we're going to need to see the wiring diagram that's inside the blower door.


  • Ironman
    Ironman Member Posts: 7,516
    You posted the model number for the outdoor unit, but your problem description is of a gas furnace.

    If the board sees an open limit or flame rollout switch, it will run the blower (and probably the inducer) continuously to cool the heat exchanger down.

    It’s possible that you blew the fuse on the control circuit or the transformer.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • sendi_t34
    sendi_t34 Member Posts: 3
    Thank you guys, it was the 3 amp fuse on the board. I was able to replace it.
    furness came back
  • pecmsg
    pecmsg Member Posts: 5,254
    sendi_t34 said:

    Thank you guys, it was the 3 amp fuse on the board. I was able to replace it.
    furness came back

    Did you disconnect the high voltage from the air handler before screwing around with the low voltage wiring?
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 9,161
    pecmsg said:

    sendi_t34 said:

    Thank you guys, it was the 3 amp fuse on the board. I was able to replace it.
    furness came back

    Did you disconnect the high voltage from the air handler before screwing around with the low voltage wiring?
    Obviously not. That is how the fuse got blown.
    @pecmsg, you cant expect DIY to have that kind of knowledge on the first try. But they have that knowledge now.

    It was a NEST problem I'll bet. LOL

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 16,298
    Nests and Tiger loops cause more problems than they solve. And that is a fact.
    SuperTech
  • sendi_t34
    sendi_t34 Member Posts: 3
    yes , while workign with fuse I did shut off the high voltage.

    yes it was nest.

    even for the first time I turned off the breaker that was marked a/c but apperently it as for outside unit and the high voltage switch was installed above the unit taht I had to turn it off..
  • pecmsg
    pecmsg Member Posts: 5,254
    sendi_t34 said:
    yes , while workign with fuse I did shut off the high voltage. yes it was nest. even for the first time I turned off the breaker that was marked a/c but apperently it as for outside unit and the high voltage switch was installed above the unit taht I had to turn it off..
    There’s a breaker in that panel for the air handler. Find it and mark it. 
    SuperTech
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 9,161
    EBEBRATT-Ed said:

    Nests and Tiger loops cause more problems than they solve. And that is a fact.

    The cause more problems that you hear about, not more than they solve,

    I know of at least 25,000 tiger loops were installed without anyone ever coming to heatinghelp.com to say

    I Just installed Tiger Loop and it solved all my problems. Can you tell my why I did not have a problem?

    The Nest thermostat is another story
    The folks who install them always call @pecmsg to tell him how much they love all the features.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    Ironman
  • pecmsg
    pecmsg Member Posts: 5,254
    EdTheHeaterMan said:

    EBEBRATT-Ed said:

    Nests and Tiger loops cause more problems than they solve. And that is a fact.

    The cause more problems that you hear about, not more than they solve,

    I know of at least 25,000 tiger loops were installed without anyone ever coming to heatinghelp.com to say

    I Just installed Tiger Loop and it solved all my problems. Can you tell my why I did not have a problem?

    The Nest thermostat is another story
    The folks who install them always call @pecmsg to tell him how much they love all the features.

    Why do I feel like the Maytag repair man :)

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