A problem filled Goodman

[aleric]

I have a problem with a goodman GMP50 I replaced the gas valve after recieving the 1 flash code meaning that there was a problem either with the gas pressure, gas supply, flame sensor, or the gas valve. That didnt solve the problem the gas pressure is within limits the thing wont fire so i cant see it being the flame sensor. I was stumped i was told it may be the board so i replaced that with another gas valve this seemed to work the furnace fired a few times I was happy and left when i got home i got a call telling me that the furnace was not working again oh yeah the furnace is 7 years old and has gone thru 3 different ignitors anyhelp on the matter would be great

[airworx]

quit selling goodman. ha ha if you changed the board and the gas valve then i would check the ignitor. also if you touch the ignitor with your fingers they will not last. the oils on your fingers gets on the carbide or whatever it is and it shortens the life span.

[rohalon]

Seems like you should try replaceing the other part the flash code indicated might be the problem.

[aleric]

I dont sell them and never plan to even though they have a 10 year parts and labor warranty Its just a friends that i have been working on and I forgot to mention that the ignitor comes on and off til the furnace goes into lockout then it gives me the 1 light code

[mike3]

Originally posted by aleric
I gas pressure is within limits



And what was it?

[airworx]

if the ignitor is coming on and the gas valve is not opening then check to see if the gas valve is getting voltage and if not check the control board.

[Mr HVAC41]

check the board polarity and ground. most boards are input voltage sensitive in that they are polarized. also, most furnaces wont fire (or something like this) if they do not have a good ground. check to make sure furnace is grounded to the main box in some way. you might also try splicing a wire from the plate over the top of the burners to ground.

just get about 2 foot of green wire and splice one end to the main ground. i know the cabinet is grounded but i see this all the time. attach the other end to a screw on the burner cover plate deal.


just an idea from your friendly Heat Miser. and make sure their filter is clean too!!!

[aleric]

I dont remember right offhand but when i did tell the goodman rep what it was he said that it was good. Oh and i havent talked to him since about the problem as it is hunting season in Pa and he is not reachable at the present time

[RoBoTeq]

What part of PA?

[jumpit]

Also jump from the board straight to the gas valve around all the limits and rollouts, and if that does not work jump the pressure switch also. It could be dropping out after it closes and you could not see a code for that. You will have to let the inducer motor run for a few seconds first before you jump it.If you jump R to W in the 13 board and jump to the valve and around the pressure switch all you have left on this model is the board and the valve.It could be a main power issue as described by a previous post.

[billva]

get yet another valve and your first board.
if that doesn't fix it, call in a qualified tech that will have the proper tools and knowhow to fix it.

[dash]

Originally posted by RoBoTeq
What part of PA?


Apparently the "cold" part!!LOL!!!

[classical]

Sounds more like you are the problem not the furnace. It appears you need training classes.

[Jultzya]

Originally posted by aleric
I dont sell them

So what brand do you sell?

[stonefly]

if its not firing its not ground or polarity .those effect flame rectification flame proof.if you jump r to w you can be sure of a call for heat ..but you already are eh? and you cold burn out the heat anticipator if its a mech. stat.do you have 24 v. at gv?,does gas come out?,did they pay gas bill?

[AllTemp]

Originally posted by classical
Sounds more like you are the problem not the furnace. It appears you need training classes.

You think?

Kind of scary to think there are people out there diagnosing equipment like this....

But then again I'm grateful for the work they provide.

[mike3]

What do you guys think about advising poster to go to the pro section when we encounter one like this? I guess according to the rules we shouldn't be giving this type of advice here. I know I enjoy trying to help out, however I don't want to violate site rules, I also am a "guest".

[Black Adder]

I agree with Mike, probably should keep my mouth shut on posts like this.

[airconman]

GMP I'd check the heat exchanger as a just because but anyway... now to your problem. are you sure your not shutting off on pressure? Check your drains and vent piping. 3 ignitors sounds like a grounding problem.

[krd]

First: We really shouldn't post jump this and jump that!! That's why they make meters. If you don't know what the gas pressure is but the rep said its ok?? whens the last time he worked on a furnace. We had the same problem on an amana last yr. Turned out to be water in the main gas line. It would fire and go out a couple of minutes later and do it until it locked out. Hooked up monitors on the incoming gas as well as the burner section. Meters on gas valve etc and we could watch the gas pressure start to drop off as it ran. Did you check the pressure switch to see if it was dropping off as it ran. Is he having any trouble with any other gas appliances in the house. Turn them all on at once and see if you loose main line gas pressure.

[bob hubbard]

Is this nat or propane ?

[RoBoTeq]

Originally posted by classical
Sounds more like you are the problem not the furnace. It appears you need training classes.

This is why I'm being cautious. Tech support does not cease to exist during hunting season.

[RoBoTeq]

Originally posted by Black Adder
I agree with Mike, probably should keep my mouth shut on posts like this.

I third this motion. So far we have no indication we are dealing with a pro. There has been no pertinent data given.

[RoBoTeq]

Originally posted by airconman
GMP I'd check the heat exchanger as a just because but anyway... now to your problem. are you sure your not shutting off on pressure? Check your drains and vent piping. 3 ignitors sounds like a grounding problem.

Hey genius! What drains? This is not a condensing furnace.

And not to be too picky, but there is also no such thing as a GMP50. There is a GMP050-3 and various revisions of that model, none of which had the overtemperature issues that the GMP075-3 experienced because of air shooting up the back of the furnace not hitting the heat exchanger.



[Edited by RoBoTeq on 11-11-2005 at 07:16 AM]

[bob hubbard]

Did this furnace come with the beckett burner ?

[aleric]

Well I would like to say thanks to those who tried to help and well you know what to those who had to be jerks. I dont know what you all mean by professional but i have been back in the field installing furnaces and air conditioning equipment for the last 5 years and have just recently started tuneups and light service so this end of the business is still new to me, I dont know if this matters to anyone but i am nate certified in install for gas heat, heatpumps/AC, and for those that wanted to know the rep is from pittsburgh area i am in the rochester area and our company sells lennox.

[Mr HVAC41]

Originally posted by aleric
our company sells lennox.

i'm sorry!!! lol!

[mike3]

Originally posted by aleric
Well I would like to say thanks to those who tried to help and well you know what to those who had to be jerks. I dont know what you all mean by professional but i have been back in the field installing furnaces and air conditioning equipment for the last 5 years and have just recently started tuneups and light service so this end of the business is still new to me, I dont know if this matters to anyone but i am nate certified in install for gas heat, heatpumps/AC, and for those that wanted to know the rep is from pittsburgh area i am in the rochester area and our company sells lennox.

To avoid problems in the future you may want to post in "Pro section"

[srmfsr]

Is the rep's name"Diceman"??? If so, you're in trouble.

[airconman]

funny when they don't know somethin they just toss out insults aint it. I wish I had time to sit on this thing and look up every furnace to see what it is. instead of just trying to help.

[bittan]

Aleric. Contact GBG Supply in Rochester. New location on Buffalo Rd near Mt. Read. They are the Authorized Goodman/Amana dealer. Dale Enders is the one to speak with.

[dugfish]

I would replace Inducer, ignitor, gas valve, blower motor, circuit board, burners, pressure switch, transformer, t-stat, chimney liner and hope for the best.

[airconman]

you forgot the limit dugfish

[troyorr]

I have a junkey Janitrol furnace that won't work. I changed the thermostat and the filter and it still won't wor. These furnaces are nothing but junk. What is wrong with it? Can you tell me how to fix it?

[Mod01]

That's enough guys. Let it R.I.P.

mod01.

[Mr HVAC41]

Originally posted by troyorr
I have a junkey Janitrol furnace that won't work. I changed the thermostat and the filter and it still won't wor. These furnaces are nothing but junk. What is wrong with it? Can you tell me how to fix it?

well, lets see....

we can only establish that your furnace 'does not work'. we have no idea whatsoever what it does and/or does not do. we know it is a janitrol /goodman.


thats about all i can establish besides changing the filter and the stat. based on calculations, i would say that repeated use of the furnace with, i am assuming a dirty filter that gets thought about every once in a blue moon and is changed every 2 years. i also assume that the system was oversized for the house and that you do not have it professionally tuned every fall like you are supposed to.






therefore....






you should just buy lots of ceramic heaters to heat your house because i assume you cant take care of a furnace! ceramic heaters are cheaper to replace every 5 years than a furnace since you tried 2 things and 'could not get your 'junk' to work'!

just because your poor furnace is a janitrol doesnt mean its junk! i have a customer that loves his williamson 5 in 1 and it runs about 60% or so but he loves it to death! i used to be like that about janitrol and icp units. i have come to like goodman. i still umm, dislike icp products for personal reasons. but this single icp model has been suspected of problems.

see?! i can assume lots of things! roflmao!

[Jultzya]

Originally posted by mr hvac41
i have a customer that loves his williamson 5 in 1 and it runs about 60% or so but he loves it to death!

Ditto.

They can't see the savings by replacing that heap. :(

[berg2666]

I did not ever see an answer for bob's question. Is it the beckett burners?

[jumpit]

If you installed a new board? A 1998 model has an edge card on the bottom of the board.On the new board you will install a 9 pin connector with a red and blue wire that goes to the transformer, there will also be a white jumper in this New connector, cut this jumper if you do not it will not work.

[bob hubbard]

All the goodmans w/o the updated burners are a problem ! Why do you think they changed the burners ? BH

[bob hubbard]

boo

[RoBoTeq]

Originally posted by berg2666
I did not ever see an answer for bob's question. Is it the beckett burners?

This model would not have had the Beckett burners. Yes, the Beckett burners do compensate for some chimney issues but they are not a cure all for an improper installation.

[jumpit]

I am sorry the 98 model will not have the edge card, and as far as don't jump stuff whatever check it if you want too. I have tallk with several people that say they checked the switch and it is ok then we jump it and it works go figure?