[frissbeegolfer]

Hi,I noticed my gibson furnace m#KG6RK 072C-12A S#KGA021204267 cycling an not starting. It locked out.got a flashing light said I had a bad ground.so I took it apart and found nuetral wire melted to flue and other wires melted to inducer.I clip out bad wires and reconnected and cleaned off flame senser.it seem to work fine for about a day then it would start on the 2nd try or third try or sometimes lock out again. I have a red(hot) wire coming in and a white (nue) wire coming in.I don't see a ground wire coming in.any suggestions on what to do from here.thanks,greg

[hvac1000]

Here is your install manual. That furnace is branded by about 5 different names and Gibson is just one of them. There is a complete wiring and check out listed in this manual. The diagram clearly shows a need for a ground wire and I am surprised it worked at all without one.

http://www.nordyne.com/Literature/a779a.pdf

Install manual.

http://www.nordyne.com/Literature/708291b.pdf

[frissbeegolfer]

Thanks for the info, that will help plenty. Greg

[hvac1000]

You will get it working again.

[frissbeegolfer]

Hi,the furnace is grounded.I'm still having problems with it.I'm getting 4 flashes which is ignition failure,where should I go from here?thanks greg

[frissbeegolfer]

The igniter had a resistance of 100 ohms,the roll out switches were 0 ohms, so I think there is nothing wrong there.

[hvac1000]

i'm getting 4 flashes which is ignition failure,where should i go from here?thanks greg
What does it say the 4 flashes indicate? Look in manual or on back side of blower acces door.

What is the resistance supposed to be according to the manual for your unit I posted?

[frissbeegolfer]

I don't think it gives me that information in the manual. Thanks greg

[hvac1000]

See this link below. Look for figure 28 on page 30. Now READ the lower left side information in regards to 4 Flashes. I posted this information above in my first post back to you. You should read ALL the links and information I posted here. I spent my time looking all that stuff up for you so the least you could do is read it. I also suggest you keep a copy of that information for future use on your computer and also in a safe spot like a CD or DVD. You may not find that information so easy again.

http://www.nordyne.com/Literature/708291b.pdf

[frissbeegolfer]

OK,somehow your not following me.I know what the 4 flashes stands for I even state what it is in one of my questions,it is ignition failure(check ground)i've checked the ground.now I would like to know where to go from here.I happened upon an answer you gave somebody about how much resistance a igniter should have,so I checked mine its 100 ohms.you stated for their igniter should be around 60-300 ohms,I was wondering what mine should be.trust me I've read the manual link you sent me but certainly can't find what the ohms should be for mine if even different which it probably isn't. The igniter may not even be an issue,but felt I should check it anyway.so anyhelp on trouble shooting my problem would be greatly appreciated. Thanks,greg

[hvac1000]

OK we need step by step from start to failure.

If after reset you still are getting 4 flashes it is still indicates bad ground. I need to confirm this. You checked the ground wire from the main electric panel to the furnace disconnect then to the furnace ground? Is this correct?

You checked that the circuit board has a good ground? Many times this ground is a wire OR the circuit board screws to the furrnace metal. Did you check this ground also?

The reason is that the ground is a very important for these units and a bad or intermittent ground will cause problems that you will never figure out if the ground is bad. That is why the ground has to be confirmed GOOD all the way from the panel to the furnace and then to the circuit board.

In your initial statement

i have a red(hot) wire coming in and a white (nue) wire coming in.i don't see a ground wire coming in.any suggestions on what to do from here.thanks,greg

You said you did not have a ground so this also bothered me as now you seem to have found one?

Also any time you have had a short circuit like melting wires it can cause other problems down the road. We are dealing with sensitive electronics here.

Also check to be sure the neutral wire is going to the neutral on the furnace and the power wire is going to the power wire on the furnace. You would not believe how many times a reversal of these two wires have caused problems. Sometimes they will work for awhile then fail until the wires are placed correctly.

One last item. Post the exact chain of events from start up to failure. IE call for heat,inducer fan on,etc.

[frissbeegolfer]

Hello,thanks for replying,I was checking to see if the hot & nue wires coming from the electric panel were hooked up right at the unit which they are, then the unit kicked on and I noticed that only one burner was lit. I've never seen it do that before.so I took out the burner assembly and blow it out with my air compresser.there was dust debris in between the burners keeping the gas from traveling from burner to burner.hence my problem.thanks again for your time and knowledge, I appreciate it. Greg

[hvac1000]

You have it going for now and that is good.

[Mikie D]

The flame sesor has a resistor wire did that melt to inducer and did you check pressure switch remember it is open when the system starts and then the inducer motor pulls in the pressure swith to make and then the system starts. Try jumping out pressure switch 5 seconds after inducer motor starts. Let us know Mikie D.

[frissbeegolfer]

Its working now.thanks, greg

[hvac1000]

Glad you got it going Greg. If you have any more problems post back