Ruud Furnace - No Heat - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 10-29-2011, 10:15 PM   #1
Newbie
 
Join Date: Oct 2011
Posts: 2
Rewards Points: 10
Default

Ruud Furnace - No Heat


I have a Ruud Model UGRA furnace. According to the specifications it has a Direct Spark Ignitor. I have read the troubleshooting information below and have several questions. Because it has a direct spark ignitor I realize the ignitor will not glow. I hear a clicking sound but cannot see a spark. Is the clicking sound the arcing of the spark across the gap? I have the lights dimmed and cannot see a spark.Should I be able to see the spark?

I also cannot hear the gas hissing. Is the problem the ignitor or the gas valve not opening? Or is there some other issue causing the gas not to ignite?

Can I manually (safely) hold a flame to the burner to rule out the gas valve?

Thanks



1. Thermostat calls for heat.

2. Draft inducer motor starts.

3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes.

4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas.


Advertisement

paschalleddie1 is offline   Reply With Quote
Old 10-30-2011, 02:53 AM   #2
how
Member
 
Join Date: Feb 2011
Location: Vancouver BC
Posts: 1,554
Rewards Points: 624
Default

Ruud Furnace - No Heat


The clicking sound is probably a spark that is making its way to ground but if you can't see it occuring at the pilot outlet then try re routing the ignition line that is conected to the igniter away from any metal that it may be grounding out to before the pilot. In the dark you can usually see where on the line that the spark is making its way to ground. Don't try moving the line when there is an active call for heat or we may not be hearing from you again.

Advertisement

how is offline   Reply With Quote
Old 10-30-2011, 03:40 AM   #3
REP
Member
 
Join Date: Jul 2011
Posts: 615
Rewards Points: 500
Default

Ruud Furnace - No Heat


HOW buddy! In a direct spark system there is no pilot.It sparks to the burner and igniotes the gas coming out of the burner.
To find the ignitor go from the spark box and follow the heavy wire out under the burner to the ignitor.The flame sensor will be a much thinner wire
I don't know the model you mention but the ignitor is usually an orange wire and the sensor is usually a white wire.Not always but on most units.
REP is offline   Reply With Quote
Old 10-30-2011, 11:35 AM   #4
how
Member
 
Join Date: Feb 2011
Location: Vancouver BC
Posts: 1,554
Rewards Points: 624
Default

Ruud Furnace - No Heat


Thanks Rep.
A major senior's moment not reading the "DIRECT" part of his discription.
My Bad, mentioning the pilot part of it.

Last edited by how; 10-30-2011 at 11:41 AM.
how is offline   Reply With Quote
Old 11-01-2011, 06:25 PM   #5
Newbie
 
Join Date: Nov 2011
Posts: 12
Rewards Points: 10
Default

Ruud Furnace - No Heat


So have you found the solution to your problem yet. I believe right at this moment we are experiencing the same problem with our furnace.

Looking for some help.

cheers
longspur is offline   Reply With Quote
Old 11-03-2011, 09:09 PM   #6
Newbie
 
Join Date: Nov 2011
Posts: 12
Rewards Points: 10
Default

Ruud Furnace - No Heat


Fixed mine last night - cause - faulty low pressure switch
longspur is offline   Reply With Quote
Old 11-03-2011, 10:31 PM   #7
Newbie
 
Join Date: Nov 2011
Posts: 1
Rewards Points: 10
Default

Ruud Furnace - No Heat


We have a Lennox Elite Series furnace. Our furnace is in the attic so it is hard to get to. We cannot get it to turn on. We bought a new thermostat and it wasn't the problem. My husband has tried to shut the unit off and then on again but that didn't help. We turned the thermostat down let it sit and then up past 80 degrees and nothing came on but the fan. Does anyone have any advice?

Last edited by RHOWARD; 11-03-2011 at 10:32 PM. Reason: need to put in type of furnace
RHOWARD is offline   Reply With Quote
Old 11-04-2011, 01:45 PM   #8
Newbie
 
Join Date: Oct 2011
Posts: 2
Rewards Points: 10
Default

Ruud Furnace - No Heat


I replaced the ignitor and that did not solve the problem. I called a service contractor in and the gas valve was diagnosed as non functioning. Since my furnace runs on LP I've opted to leave the repair to the technician since the valve must also be modified for LP use.

Thanks again All who took the time to offer help.

Advertisement

paschalleddie1 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replace Heat Exchanger or Furnace deccher HVAC 41 10-22-2013 09:45 PM
Heatpump vs Natural Gas - Energy Cost Spreadsheet zootjeff HVAC 8 11-19-2011 11:45 PM
Ruud furnace makes loud boom starting up ruud HVAC 5 01-16-2011 11:16 PM
How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use? twilightcall HVAC 34 12-28-2010 07:53 PM
New Cased Coil - Install to Furnace - PICTURES!! hartkem HVAC 39 11-18-2008 02:45 AM




Top of Page | View New Posts