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My heater will not ignite a flame to heat my water. My gas is on to the unit, all electrical is on to the unit, I even pushed the on-off switch inside the unit.

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Gas Water Heater Fails to Heat Water Is your hot water heater failing to heat the water? Start here to troubleshoot the problem. My heater will not ignite - 20090617133114_gas-water-heater-wont-light.gifIf a gas water heater fails to heat water, perform these diagnostics:
1) Be sure the gas is turned on. Turn the gas control knob to PILOT to prevent the burner from igniting when you are looking inside. Remove the metal cover at the bottom of the water heater and look to see if the burner and/or pilot light—the small flame at the end of the pilot gas supply tube—are lit.
2) If the pilot light has gone out, follow the instructions on the tank to relight it. It’s also possible that the gas inlet valve has been closed partially or all the way. If so, turn the handle parallel to the line and relight the pilot. If the pilot won’t light, the thermocouple may be defective—either call your gas utility company (a free service in many areas) or an appliance repairperson. (Newer water heaters may have a glow plug or spark ignitor instead of a pilot—follow the instructions in your owner’s manual.)


3) If the burner is not on, replace the cover and make sure the thermostat is set to about 120 degrees F. If it isn’t, adjust it, turn on a hot water faucet, and then wait a few minutes to see if the water heater burner ignites. If it doesn’t ignite, leave the hot water running and try lowering and then raising the temperature setting on the dial until the burner ignites.If the burner ignites, replace the cover and turn the thermostat back to an appropriate setting. If the burner doesn’t ignite, have the water heater checked out by an appliance repairperson. It could be that the heater’s thermostat is defective. Replacement is best left to a plumber.



4) Smell for gas. If you smell a garlic-like scent, turn the gas valve control to OFF (you may have to push down to turn it). Wait until the gas smell has dissipated before relighting the pilot light. If the gas smell is strong and doesn’t dissipate, immediately turn off the gas supply valve, ventilate the space, and call your utility company from a remote location.

Posted on Jul 10, 2010

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2 Answers

Heater comes on then shuts off plenty of water flow


check pressure switch and flame sensor

Mar 03, 2015 | Raypak Pool & Spa

1 Answer

Have an rlp30 reddy heater, have spark and gas but will not light.


wile red button is pushed no flame or turns off when the button is released the flame dies ? if no flame tank is too small or spark isn't in far enough to catch gas . if flame is present with button down then the over heat switch on the in line thermal coupler could b bad u can check the over heat switch with a jumper between the two wires and if it stays lit you got it if it goes out then its the thermal coupler that's bad

Dec 12, 2013 | Reddy HEATER RLP30 30,000-BTU PORTABLE LP...

1 Answer

On A.O. Smith water heater model BTH 199 100 where is the heat sensor rod located ?


Parts list:
http://www.hotwater.com/lit/partslists/197728-004.pdf
Flame rod, flame sensor sits next to igniter inside combustion chamber. This can be cleaned with sandpaper. Do not touch with fingers. Purpose of flame rod is to detect whether ignition has caused actual, sustainable fire inside the combustion chamber.
If sensor is bad, or no ignition is detected after 2-3 attempts, then 'no ignition' error is given.
Bad gas control valve, bad-or-dirty flame rod-sensor, low gas pressure, misaligned rod, dirty combustion parts, etc

Service handbook:
http://www.hotwater.com/lit/training/316586.pdf
High gas pressure spikes can daMAGE gas control valve p7

Product manual:
http://www.hotwater.com/lit/im/com_gas/197727.pdf
Word-search for 'failure'
Low gas pressure. p14 and p54
1-3 trials before declaring 'ignition failure. p48
bad flame sensor (clean with sandpaper) #10 p58
unit must be grounded (check outlet with circuit analyzer) #12 p58
Sequence flow chart p59
Rough starts = ignition failure p60
Troubleshoot chart - ignition failure p62

Mar 12, 2013 | A.O. Smith BTH-199 BTH-199 100 Gallon...

1 Answer

I have a H250IDL heater. All electrical installation is correct. I have converted it to propane with the proper conversion kit that I have ordered from Hayward. My problem is, the gas valve will not...


Have you checked the flame sensor is in the correct position and it clean , and the connection is tight , also check pressure switch is working, tubes not spilt .

Feb 27, 2017 | Heating & Cooling

1 Answer

Water heater burner wont light


Problem is not thermocouple:
Thermocouple should be finger-tight plus 1/4 turn
Overtightening will short thermocouple against gas control valve, and solenoid switch will not open, and no gas will reach pilot once red button is released.
Tip of thermocouple has to sit in the pilot flame.
If pilot flame will stay on, then thermocouple is good.

Problem is not solenoid switch.
The gas control valve solenoid opens and closes gas supply to gas control valve.
On mechanical gas control valve, when you push down the red button to light pilot, then you are opening the solenoid and letting gas flow into gas control valve.
When heat is applied to thermocouple, a small electric current travels to gas control valve, and this causes solenoid to stay open.
If you extinguish pilot, then no current travels to gas control, and solenoid clicks off.
You can hear it click, and this is how you test it.
However, since you are getting gas to pilot light, then the solenoid is not the problem.

This leaves 4 possible problems:
1) Bad gas control valve thermostat.
http://waterheatertimer.org/pdf/How-to-replace-water-heater-gas-valve.pdf
2) Inadequate gas pressure. Call gas company.
3) Dirty combustion parts. Clean the burner with wire brush and water.
4) Clogged air intake on FV water heaters: Rheem FV gas water heaters have glass vial that will break if combustion is slowed by clogged air intake.
http://waterheatertimer.org/How-to-repair-Rheem-TRD.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Oct 06, 2012 | Rheem 40 Gallon FVR NATGAS Water Heater 6...

1 Answer

I have a 7-year old Raypak RP2100 pool heater (w/ elec. pilot lighting) that continues to flame-out. The gas company says there is enough gas pressure feeding into the unit, but my pool guys say there is...


It sounds like an issue of either incorrect gas valve settings, or a case where the refractory kit has started chipping off on the flame bed.

Heres what you need to find out. Can your service tech tell you what the pressure is before and after the regulator?

On natural gas it should be before the gas valve at 7-14 inches of water colum.
After the gas valve should be 4 inches water colum.

For propane it should be between 12-14 inches water colum before the gas valve and 10.5 inches water colum after the gas valve.

If you tech cannot verify any of this, you need a new tech. This should have been the first thing to be looked at.

Note: The most common cause for flame rollout (which is what you describe) is the refractory kit chipping and cracking . Then peices fall onto the burner tray and cause the high flame condition that you mentioned. If the tech working the job has not checked before and after gas pressures, and cleaned and inspected the burner tray and the heat exchanger. Fire him. These are all the quick easy things that would get you down to the bottom of your current situation. I wish I could go more in depth with troubleshooting, but it is difficult on these forums. You can contact me with any other questions at adamh@newconceptchem.com

Apr 26, 2011 | Raypak UNITHERM GOVERNOR KIT

1 Answer

Dryer starts hot surface ignitor comes on gas valve opens i get a flame 5 mins flame shuts off hot surface ignitor repeats and tries to ignite no flame after unit is off for 20 mins to 30 mins off unit...


Hi, If you are having problems with your gas dryer not heatingthe most common problem is that the ignitor goes bad. Even though it glowssometimes it is still not working properly. if you dryer is gas check out this gas no heat tip.... If you have an electric dryer, you can have many differentthings that can go wrong causing the dryer not to heat. check out this electric no heat tip...

heatman101

Sep 17, 2010 | Kenmore 77632 Gas Dryer

1 Answer

The electronic ignition on a gas water heater will not heat up and glow red to ignite the gas to heat the water atwood r/v water heater


You won't see any red glow until the burner ignites and burns for a while. Its only an ignitor and flame sensor, not a glow plug style.The ignitor has to provide spark for gas to ignite, then it also senses the flame and keeps gas flow coming. What exactly is happening when you turn it to on?

Jul 18, 2010 | RTO Atwood DSI-RV Water Heater-6 Gallon

6 Answers

Larrs lite low knox ten years old fires for seven seconds.three times than goes into ignition lockdown.new fire sensor installed didn't solve the problem. gas flow adequate, could it be bad gas valve? ...


Are you sure that the flame sensor is installed correctly? If the flame comes on and the flame sensor is right in the flame, then the control module is not working right. It's not 'seeing' the flame sensor input. You can prove it by jumper across the contact wires on the flame sensor. If it stays lit when you jump out the sensor, it's not working. The flame sensor tip needs to be right in the pilot flame to sense heat.

Aug 29, 2009 | Teledyne Laars Laars Lite 2 Pool Heater...

1 Answer

Kenmore gas dryer 110.97566200 gas dryer is running throught the cycle but no heat.


Your Heating Elements could have problemA dryer sometimes won't heat or heats too slowly because of a variety of reasons. By following the guidelines below, you can inspect the heating elements on a gas or electric dryer to pinpoint the source of the problem.

Troubleshooting the Gas Heater

In a gas dryer, heat is provided by a gas heater that is controlled by an air shutter. The gas heater is generally the source of no-heat or drying problems. You can often correct such problems by adjusting the air shutter on the gas burner, which is located along the bottom of the dryer.

To adjust the shutter, take out the screws and remove the panel that covers the gas flame. Turn on the dryer so the flame is burning. If the flame has a deep blue color and you hear air whistling around the burner, the air/gas mixture is receiving too much air. If the flame has a yellow tip, the mixture is not receiving enough air. Turn the thumbscrew or loosen the two screws slightly to increase or decrease the flow of air to the burner. Keep turning until the flame is a light blue color, without any yellow, and the whistling stops.

Gas dryers use an electric ignition device rather than a pilot light to light the gas heater: An element becomes hot and glows like the filament in a lightbulb. Electric ignition systems are always sealed; you can't adjust or repair them. If an electric ignition device fails, call a professional service person for replacement.
how-to-repair-a-dryer-2.jpg
©2006 Publications International, Ltd.
In a gas dryer, heat is provided by a gas heater, controlled by an air shutter.
Electric dryers have self-contained electric heating elements.

Servicing the Electric Heating Elements

Electric heating elements, found in electric dryers, are self-contained units located in the back of the dryer. A defective heating element is frequently the source of no-heat or drying problems. Remove the back service panel to gain access to the elements.

The heating elements are located inside the heater ducts. If you think a heating element is faulty, test it with a volt-ohm-milliammeter (VOM) set to the RX1 scale. Disconnect the leads from the power terminals and clip one probe of the VOM to each terminal. The meter should read about 12 ohms. If the reading is higher than 20 ohms, the heater is faulty and should be replaced. Replace a faulty heater with a new one of the same type and electrical rating. A heater connected to a 115-volt line usually has an 8.4-ohm resistance; a heater connected to a 220-volt line usually has 11 ohms resistance.

The heater may also malfunction because it's grounded. To test for this, set the VOM to the RX1 scale and remove the leads to the heater. Clip one probe of the VOM to a heater terminal and touch the other probe to the heater housing. The meter needle should jump to a fairly high reading. If the needle flicks back and forth at a low reading, the heater is probably grounded and should be replaced. Here's how to replace the heater:

Step 1: Remove the back of the dryer. If necessary, also remove the cabinet top.

Step 2: Disconnect the leads and remove the screws that hold the duct in position. Then lift the entire heater unit out of the dryer.

Step 3: Remove the screws that hold the heating element in the duct.

Step 4: Slip the new heating element into the heating duct the same way the old one came out. Be careful not to damage the resistance coils. Replace the screws that hold the heating element in the duct, reconnect the leads, and screw the unit back into position

Aug 04, 2008 | Kenmore 63942 Dryer

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