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Lennox furnace gas valve not opening.
Take out the bolts in the service panel on the side of the furnace using a nut driver.
The valve will make a chattering sound while its open.
This is a real time look at how i m keeping warm until the new gas valve comes.
It goes away if i give the inlet pipe a slight rap with a wrench.
The problem is intermittent in that it does not happen each time the furnace comes on.
Furnace gas valve will not open hot surface ignotor lights can here click for solenoid no 24v.
Flame sensor is clean.
In addition to the air flapper valve there is a gas flapper valve also.
Sorry about the poor camera work.
The gas never flows there s no click from the valve opening and the flame never lights.
These furnaces were made between 1982 until the middle 1990s.
I missed the money s.
Locate the gas valve which is typically near the bottom of the unit positioned next to the pilot light.
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Thermostat is not the issue tried swapping the two and it didn t fix it rollout switches have continuity.
Replaced board gas valve hot surface ignitor flame sensor and tstat we disconnect re and white wire to board l e d is on constant.
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It goes away.
Lennox g16 gas furnace click here the lennox pulse g14 and g21 gas furnace.
If you do not have the ability to do these operations safely do not attempt them.
Fixing a gas furnace.
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What sould we do next.
I have a lennox furnace with a honeywell gas valve gsv8204h1006.