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I have a Mod 30DV-5B Gravity Direct Vent Wall Furnace. In service for 5 years. Pilot light does not light when gas knob is depressed and spark igniter actuated (visible spark). Heater was turned off all summer. Main gas valve is turned on at the heater inlet. Cannot hear the gas flowing when pilot valve depressed. Arthur R. Lee

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Posted on Jan 02, 2017

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SOURCE: Pilot light won't ignite on a Rinnai 2000 1

The trick is that it may take a long time for the flammable portion of the gas to reach the pilot light orifice where the flame lives. This happens a lot when the pilot flame has been out for some time. There won't be a clicking sound as YOU are supposed to provide the flame - it's not like a cooking stove with such conveniences, because the pilot light is only an occasional thing to light it's rare to find an ignition source built in. I'd hate to see you spend good money when all you need to apply here is time and a flame.

Posted on Sep 06, 2009

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SOURCE: It is a Williams circa

That hole should only be a problem, if a strong draft comes thru and blows the pilot out. But that hole may also be for match lighting the pilot in an emergency. The older models like yours, had that feature. Check it closely, before you decide to block off the hole.

Hope this helped you.

Posted on Jun 19, 2011

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WILLIAMS 2509622 OWNER'S MANUAL Pdf Download.

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That hole should only be a problem, if a strong draft comes thru and blows the pilot out. But that hole may also be for match lighting the pilot in an emergency. The older models like yours, had that feature. Check it closely, before you decide to block off the hole.

Hope this helped you.

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1 Answer

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The steps involved can vary slightly depending on your furnace model and pilot valve type, so if possible try and find the instructions inside the furnace door cover or in the instruction manual. This is for a gas fired furnace, but applies to any gas-fueled appliance including water heater. Two of the most common types of pilot valve body assemblies either have a red reset button and a gas valve or no reset button and a valve knob that can be depressed. But whichever type you've got, if you have an older model furnace with a standing pilot (flame is lit all the time) then this is the basic procedure.
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  • Find the pilot. It's located near the gas burner tube assembly in the furnace.
  • Get your match or lighter ready. Sometimes the pilot is hard to reach. If possible, try and use a long fireplace match when you light it. If you don't have a fireplace match then a butane BBQ grill lighter works well too. If you don't have that, then you can fasten a match to the end of a stick when you light the pilot
  • If you have a pilot with a red Reset button, turn the gas valve from "Off," to "Pilot."
  • If you have a pilot with no red button, turn the knob from "Off" to "Pilot."
  • Place the lit match or ignited lighter tip at the pilot and depress and hold the button or depress the knob as appropriate. Depress the button or knob for about 30 seconds. This maintains gas flow to the pilot until the thermocouple gets hot enough to open the main gas valve.
  • Once the pilot stays lit, slowly release the button or knob and turn the gas **** or knob from the "Pilot" position to the "On" position. This will ignite the burners and keep the flow of gas supplied as required for the burners as called for by the thermostat.
  • If the burners fail to ignite then it may be because the thermocouple did not get hot enough to open the gas valve. Wait a few minutes and then repeat the above procedure. This time hold the red reset button or depress the knob for about 45-60 seconds.
  • Once the main furnace burners ignite, adjust the thermostat to the desired setting.
  • If you've followed the previous steps on lighting the pilot and it still does not light after, or will not stay lit, then you probably have a problem with the thermocouple or an adjustment needs to be made to the pilot. You'll need a furnace service technician to replace or repair these parts. You may find that the pilot lights, but it is an anemic looking flame. That's a different problem we'll look at in the next section.
  • If the pilot lights but the flame is a weak yellow flame, it will not get hot enough to heat the thermocouple to its set point allowing the gas valve to open.
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    This is caused by dirt in the pilot tube. Take a needle or small nail and gently clean the tube. Flickering or Wavering Flame
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