Rudd forced air propane burner problem


  #1  
Old 12-04-06, 02:55 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
Talking Rudd forced air propane burner problem

Rudd model URGE-07ER8JKR
This is a ground level gas and a/c Pack (1987) when heat is called for the draft blower comes on, then the igniter and the burners fire with a nice blue flame, this lasts for approx. 2 minutes, then the burners start burning inside the burner tube and the flames turn yellow with a noticeable roaring sound. the flue, jets and burners have been cleaned . the propane company service man checked for proper gas pressure going into the heater. any idea as to what the problem may be? Thanks, Bill
 
  #2  
Old 12-04-06, 03:00 PM
K
Member
Join Date: Jan 2006
Posts: 210
Upvotes: 0
Received 0 Upvotes on 0 Posts
Is that after the blower comes on?
 
  #3  
Old 12-04-06, 03:07 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

I think it is before the forced air fan comes on , but I am going to check it again right now and will let you know
 
  #4  
Old 12-04-06, 03:13 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

How long has it did this??? Could the venturi of the burners be bad now??? Did he set the air right on the burners? You sure you have the psi of 11" W/C there at the burners? ARE you low on gas?? Both regulators vent holes open on them. No snow or bugs in the event holes of them?? You can have a lot of ifs here
 
  #5  
Old 12-04-06, 03:18 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

I checked again, when heat was called for the unit follwed the proper sequence and after approx. 2 minutes the flame backed down the burner tubes and started to roar. this was before the forced air fan came on which was approx. 1 minute later.
 
  #6  
Old 12-04-06, 03:21 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

What is the W/C there at the burners when this happens?
 
  #7  
Old 12-04-06, 03:24 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

propane gas is full, correct pressure going into heating unit, vents, flue, burners and venturi have been cleaned. sooting was occuring and that was the reason for the cleaning.
 
  #8  
Old 12-04-06, 03:36 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

I do not know what the gas pressure is at the burners.
 
  #9  
Old 12-04-06, 04:03 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

The gas guy should have checked what the W/C is there at the burner . While it is on
 
  #10  
Old 12-04-06, 04:08 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

I should have the gas company check the pressure as it comes out of the gas valve prior to going into the burner?
 
  #11  
Old 12-06-06, 02:15 AM
H
Member
Join Date: Jul 2005
Location: New York
Posts: 657
Upvotes: 0
Received 0 Upvotes on 0 Posts
Originally Posted by billat3800ft
I should have the gas company check the pressure as it comes out of the gas valve prior to going into the burner?
Yes. There should be two test ports on the gas control valve. One on the inlet, one on the outlet. If the inlet pressure is good (between 11 and 13" W.C.) that will mean the pipe size is and regulator is good.

The test port on the gas control outlet (manifold) needs to be checked likewise. This (depending on furnace specs) should be about 10" w.c.

Note: These pressure should be checked while the furnace is running. I've seen the inlet pressure good when the unit is off and drop down to nothing shortly after the unit fires up. If that is the case, it's likely you LP regulator at the tank is freezing up.
 
  #12  
Old 12-07-06, 10:53 AM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

the LP gas pressure at the gas valve does call for 10" W.C. the propane sevice co tested the pressure and it is not dropping at the regulator. the gas service co believes the burners are warped and need to be replaced. they say they have seen this same problem before.
 
  #13  
Old 12-07-06, 12:27 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

When you have steel burners and not the old cast iron ones. Any time the burners have lit down in the venturi tube The burner is bad and you need new ones. Also that gas psi of 11" W/C should be there on the manifold when the burners are on . Also any thing in the home that burns gas should be on also at that time to set the regulator
 
  #14  
Old 12-14-06, 02:26 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
Talking rudd forced air propane burner problem update!!!

the steel burners were the problem. I replaced them and they are working great. It took awhile to find them at a fair price. one company wanted $400.00 and the best price I could find was $250.00 until I found "partsguy.com" for $139.00.
thanks to everyone who helped.

now that its working I noticed that the forced air fan has a thump thump thump as if it has a bad belt? or the fans are dirty or ?

billat3800ft
 
  #15  
Old 12-14-06, 02:37 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

You want a soft blue flame. Not a hard one.
Dont make the belt to tight. Some of the new blower wheels are comeing apart check the blower wheel also
 
  #16  
Old 12-14-06, 03:16 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

I will check the belt and blower wheel are there bearings? looking from the top of the unit it sounds like the noise is coming from the left rear top panel (4 panels) is that where i would open it up?
 
  #17  
Old 12-14-06, 04:46 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

Not sure just what you have there. Most furnaces now dont have belts. But could. Blower should be on the bottom if the furnace is bloweing up in to a AC coil.
 
  #18  
Old 12-14-06, 05:12 PM
B
Member
Thread Starter
Join Date: Dec 2006
Location: california
Posts: 10
Upvotes: 0
Received 0 Upvotes on 0 Posts
rudd forced air propane burner problem

the unit is an outside gas pack a/c unit that is at ground level. a/c side is alongside and level with the heating side. the duct goes into the house from the back. there are 4 top panels. the left front top panel is a grid for the a/c fan/condensor. the right front top panel covers the heat exchanger. I believe the forced air fan is in the left rear top panel.
 
  #19  
Old 12-14-06, 08:11 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 17,505
Upvotes: 0
Received 1 Upvote on 1 Post
Wink

You sure you dont have side panels there??? To get into
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: