Question about Heating & Cooling

5 Answers

Rheem-Gas Furnace I have a gas furnace that will not ignite. I have attempted many times to start/ignite it using the manual suggested sequence, and I have been unsucessful. In diagnosing the problem(s) the technicial manual flowchart suggests that I replace the vent pressure switch. How do I not know I need to replace the igniter. What tests can I do to ensure it is.If I let a proffessional trained technician perform the work, How much should I expect to spend?

Posted by on

  • 2 more comments 
  • schwanz227
    schwanz227 Dec 11, 2008

    My igniter would also go out every year it seemed. but untill recently i just found out that by setting my thermostat to a temperature higher so that when I plug my unit back in the furnace will try and ignite and you can look at the igniter and watch it glow red hot, my next move is to replace the overtemprature limit switch to see if i can get furnance to ignite the draft divertert duct and vent are wide open with no restriction of air so I'm thinking that the sensor may be bad, I already tried cleaning off corrosion and still no luck.

  • robb123 Feb 19, 2009

    My gas furnace will not ignite. The igniter is working. The draft inducer motor is running but the gas never ignites.

  • Anonymous Mar 15, 2009

    I have RHEEM 80 plus furnace, about every 5 min it reignites it self,

  • williesman7 Mar 16, 2009

    Hi , I am again back after fixing the electrical damage caused when the transformer went bad and distroyed the switch wiped out the inside fuse and the outer box charcoled a 30 amp fuse .
    I am now faced with rewire the furnace
    the motor works fine ,the new transformer gives me 27 vac , the upper limet ohms ok .
    now I need a good sams for this horazontal heat only furnace
    to hook it up properly and prevent this in the future.
    Thanks Don

×

Ad

5 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 290 Answers

It may be a little difficult to diagnose if you don't have a volt/ohm meter to check the switches with, but I will try to help what I can.

The first thing to check is the pressure hose from the vent fan to the pressure switch. Make sure there is no hole rubbed in it and make sure the connector on the fan shroud is clear. Stick a piece of wire in it to make sure a dirt dobber has not clogged it up. Blow in the hose and listen for the switch to click. If there are only 2 wires on the switch, use a piece of wire to jump across them and that will take the switch out of the system. This will tell you if the other parts are working properly.
Post back with what you find and I will try to help. I don't have a digram in front of me, just working from memory, so please be patient.

Posted on Nov 26, 2007

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

Thanks for the information, I am also having a similar issue. I'll have to try some of these suggestions! I don't actually have a <a rel='nofollow' href="http://www.acoverstock.com">rheem gas furnace</a>, but I have heard good things!

Posted on Oct 11, 2011

Ad
  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Check your thermostate first then do any kind of other testing. i did it other way around and end up with board and sensor kit

Posted on Jan 23, 2011

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

My furnace filter is black and sooty my walls are showing sign of soot the fire dept check the furnace air check out fine i have a gas fireplace with a pilot could that be the problems??

Posted on Jan 28, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I replaced My control Module it now works fine, Thanks for your reply.

Posted on Jan 25, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

No heat from furnace


If this is the first time unit has been fired up, you likely have air in the lines to purge first. Also make sure the gas supply is on/open. and that if there is a fuse present on the control board (likely a 3 Amp fuse) make sure it has not blown (which can happen simply by close proximity lightning strikes.)

Letting the unit go through the ignition sequence several times will purge the line. If furnace "locks out" on third start attempt, shut it off and start cycling it again until the furnace comes on..

This assumes the installation was checked for leaks initially.

Oct 27, 2012 | Coleman 3.5 Ton 13 SEER Complete Split...

1 Answer

It does not fire at all times igniter works, I can hear the gas valve when opens, some times it fires for a minute and some times does not fire at all


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


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. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Dec 07, 2010 | Heating & Cooling

1 Answer

Have a rheem furnace/ten yrs old.just replaced thermocoupler and gas valve,furnace will turn on thermocoupler will get red but no heat? whats up?


I know it may sound strange but check to make sure the gas cut-off valve is turned parallel with the gas pipe. If its open, you may have a failed fan proof switch. air pressure from draft induced blower causes the switch to click and open the main gas valve. if this this switch doesn't click(close contacts) the maing as valve will not open to ignite the burners. its a sequence of events that a furnace goes through before it ignites the burner for heat.

Nov 28, 2010 | Heating & Cooling

1 Answer

Air pressure switch is closed before the ignition sequence causing the boiler not to ignite can you advise solution


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


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. Solution: You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Nov 26, 2010 | Heating & Cooling

1 Answer

Rheem 3204-80D furance. Turns on and fan starts. Then in about a minute the fan shuts off.


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


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. Solution: You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Nov 26, 2010 | Heating & Cooling

1 Answer

My goodman furnace keeps lighting for about 10 seconds than goes out lots of clicking sounds


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad igniter what I see most of the time is the following sequence of operation:


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.
Solution: You probably need to purchase and install a new igniter. I would suggest that you inspect your igniter closely for cracks. Make sure you do not touch the igniter with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, roll-out switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

NATE, NCCER, PHCC,HVAC Certified Instructor

Oct 25, 2010 | Heating & Cooling

1 Answer

RHEEM RGLE-10EQAGS Gas Furnace - Intermitent. Fans come on, Hot surface Ignitor comes on, then sometimes Gas Valve opens and all is fine, Other times, gas valve doesn't open and Hot surface Ignitor goes...


The sequence is Igniter comes on, valve comes on, flame sensor senses flame. If no flame is sensed after 3 tries, a lockout occurs. If you have a volt meter, check for 24-27 Volts AC coming to the gas valve, if your getting voltage to the valve but no gas, your gas valve is defective. It could be a intermittent problem, no matter, still a bad valve. if no voltage to valve, defective circuit board. 

Dec 29, 2009 | Heating & Cooling

1 Answer

Trouble shooting manual for Model# RGUJ-05EA-ER RHEEM GAS FURNACE


replace the gas valve....test for 24volt at the gas valve input.  if you have this then it's a def gas valve relay not working.

Dec 09, 2008 | Heating & Cooling

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

6,355 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3253 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...