Central unit (furnace) not coming back on
#1
11-09-20, 01:40 PM
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Central unit (furnace) not coming back on
My parents wanted me to cut the heat on. I clicked to heat on thermostat and the heat never came on. I took the front cover off the evaporator to look at it. I put the panels back on and now i can't get anything back on. The cool, heat and even the fan won't come on. Any suggestions?
It's a Goodman Evap. and Condenser.
It's a Goodman Evap. and Condenser.
#2
11-09-20, 03:08 PM
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#3
11-09-20, 03:23 PM
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Welcome to the forums.
An awful lot of pictures.
That is a Goodman GMS80804BN 80k btu gas furnace with an A/C coil.
When you have the blower door open.... you need to hold the service switch in.
I see you have it clamped..... is it actually in all the way ?
If it is.... the red LED on the control board should be blinking.
An awful lot of pictures.
That is a Goodman GMS80804BN 80k btu gas furnace with an A/C coil.
When you have the blower door open.... you need to hold the service switch in.
I see you have it clamped..... is it actually in all the way ?
If it is.... the red LED on the control board should be blinking.
#4
11-10-20, 08:55 AM
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#5
11-12-20, 09:02 AM
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#7
11-12-20, 04:53 PM
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Right...... what does actually happen...... anything..... nothing ?
Goodman GMS8 technical manual (pdf)
Goodman GMS8 technical manual (pdf)
#8
11-13-20, 09:31 AM
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Everything is good. The power is plug in and the door switch works. I can hear it click trying to ignite but it won't light the burners.
#9
11-13-20, 09:34 AM
Member
Ok, we still need more information.
Is the ignitor lighting up? Voltage to the gas valve? Error codes?
You’ll need a meter to continue.
Is the ignitor lighting up? Voltage to the gas valve? Error codes?
You’ll need a meter to continue.
#10
11-13-20, 09:54 AM
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The igniter is not lighting up and i will get back with you about the Voltage to gas valve and error codes.
#12
11-18-20, 08:16 AM
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Sorry it took so long to get back with you. This is what I got.
Thermostat wire to control panel- COM to R 26.9V & COM to W 26.7V
Gas Valve- 00.4V
Draft inducer is not coming on.
Draft Inducer wire to control panel- 3.22V
Capacitor on the Draft Inducer-5.71uF
Draft Inducer spins freely with no problem.
Pressure Switch- 25.78
Ignitor- 128.9V
What do you think?
Thermostat wire to control panel- COM to R 26.9V & COM to W 26.7V
Gas Valve- 00.4V
Draft inducer is not coming on.
Draft Inducer wire to control panel- 3.22V
Capacitor on the Draft Inducer-5.71uF
Draft Inducer spins freely with no problem.
Pressure Switch- 25.78
Ignitor- 128.9V
What do you think?
#13
11-18-20, 03:26 PM
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#15
11-19-20, 09:18 AM
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#16
11-19-20, 09:20 AM
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Across the switch? That means the switch is open, and is the source of your problem.
Don’t measure to ground.
Don’t measure to ground.
#17
11-19-20, 10:23 AM
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#18
11-19-20, 12:10 PM
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No, I wouldn’t replace the switch. The error isn’t telling you what part to replace.
You need to confirm draft, make sure the tubing is clear and the venting is free of obstructions.
The switch is remaining open because draft through the furnace isn’t sufficient.
You need to confirm draft, make sure the tubing is clear and the venting is free of obstructions.
The switch is remaining open because draft through the furnace isn’t sufficient.
#19
11-20-20, 02:28 PM
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RoughNeck77, what would you recommend then?
Draft inducer is not coming on.
Draft Inducer wire to control panel- 3.22V
Capacitor on the Draft Inducer-5.71uF
Draft Inducer spins freely with no obstruction.
This thing is aggravating me.
Draft inducer is not coming on.
Draft Inducer wire to control panel- 3.22V
Capacitor on the Draft Inducer-5.71uF
Draft Inducer spins freely with no obstruction.
This thing is aggravating me.
#20
11-20-20, 03:42 PM
Member
There you go, the issue isn’t the switch then. It’s doing it’s job because the inducer isn’t running. If you’d have bought a pressure switch you still wouldn’t have a working furnace.
You’ll have to figure out why the inducer is not running. And why there’s no power to it.
Remember, no measuring to ground.
On a call for heat-
inducer starts
draft is proven via pressure switch
prepurge
Hot surface igniter energizes
gas valve coil is energized
flame is proven
You’ll have to figure out why the inducer is not running. And why there’s no power to it.
Remember, no measuring to ground.
On a call for heat-
inducer starts
draft is proven via pressure switch
prepurge
Hot surface igniter energizes
gas valve coil is energized
flame is proven
#21
11-21-20, 11:34 PM
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Well, I found this out. I was messing around with the control board around the area where the Draft Inducer is plugged in and I heard a short. I pushed back on the control panel and held it tight. The Draft Inducer came on. I held it long enough to see if the igniter would start glowing. The Draft Inducer made its cycle and then cut off. I know I'm probably going to have to change the control board out but the igniter never started glowing, so does that mean that there weren't any gas coming out??
#22
11-22-20, 06:24 AM
Member
If the ignitor never came on, then it never was energized or there’s something else wrong preventing it from cycling.
#23
11-22-20, 11:45 PM
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#24
11-23-20, 09:42 PM
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