goodman ckt brd - http://www.hvacmechanic.com/ Forums
Original message
| KenAsh
 |  "goodman ckt brd"
, posted Mon 30 Jun 17:43  
Hi,
I have a Goodman (GMP-125-4). I recently replaced the blower motor and it appears to work as designed. However, now the compressor does not come on after waiting for 15-30 minutes for the compressor warm up cycle. The ckt. brd (B18099-06)status light flashes 4 times before it pauses and repeats. Now what could the problem be? Any wiring schematics out there to check the wiring? Althought very few wires were disconnected.
Any suggestions? Thanks for any help.
KenAsh...
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Replies:
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| KenAsh
| "goodman ckt brd update" , posted Tue 1 Jul 07:17
Thanks to all that responded,
I replaced the blower, and capacitor (why not, they're too cheap), found a harness connection not plugged onto the board. All works as designed. Cooling in plenum was 55 degrees (o/s ambient 81). I'm cool again!
I have a Goodman (GMP-125-4). When I select the cooling cycle, the o/s AC Fan runs and the cpompressor operates as designed. The furnace blower runs on what sounds like the low speed setting when and if it starts. I say "when and if" because sometimes the it just hums. When it does run, it runs on the low setting, is the high speed relay bad?
As a result of the low speed, I get lot of condensation on the outside of the unit by the "A" coil. I guess this is because the fan is not running at a higher speed and thus not moving conditioned air?
Any suggestions? Thanks for any help.
KenAsh...
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| | theduke03
| "Re(1):goodman ckt brd update" , posted Tue 1 Jul 19:35:
I'm not sure I understand the problem is. When stat calls for a/c the board will power the cool terminal. Whatever wire is connected to that will determine what speed is running. If the wire is black then it is on high speed.
Is there really not enough airflow or does it just seem that way?
Will heating and cooling run and satisfy the demand?
Did you visually see the motor humming/not spinning?
Did you see any ice on the pipes?
"My dad was the most feared furnace fighter in Northern Indiana."
[this message was edited by theduke03 on Tue 1 Jul 19:38] |
| yuri
| "Re(1):goodman ckt brd" , posted Mon 30 Jun 20:51:
There may be a sticker on the back of one of the furnace doors with a legend about what that code is, or in the owners/install manual. Is it a counter/reverse flow unit with the fan ABOVE the burners? If so there may be a manual reset limit switch attached to the back of the fan with a red reset button which may be accidentally tripped or have a loose wire. Some of the regular upflow models may have an auxiliary limit switch at the back of the fan also. Some have plastic molex plug in type wire connectors which you may have loosened.
Yuri
[this message was edited by yuri on Mon 30 Jun 20:54] |
| | KenAsh
| "goodman ckt brd" , posted Mon 30 Jun 21:36
quote:
There may be a sticker on the back of one of the furnace doors with a legend about what that code is, or in the owners/install manual. Is it a counter/reverse flow unit with the fan ABOVE the burners?
...
Hi,
I have a Goodman (GMP-125-4). When I select the cooling cycle, the o/s AC Fan runs and the cpompressor operates as designed. The furnace blower runs on what sounds like the low speed setting when and if it starts. I say "when and if" because sometimes the it just hums. When it does run, it runs on the low setting, is the high speed relay bad?
As a result of the low speed, I get lot of condensation on the outside of the unit by the "A" coil. I guess this is because the fan is not running at a higher speed and thus not moving conditioned air?
Any suggestions? Thanks for any help.
KenAsh...
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