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White-Rodgers Gas Furnace Valves. When To Replace A Gas Valve?. The valve should be replaced if any of the following occur: The outlet pressure remains above the set point or fluctuates
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When To Replace A Gas Valve? • The valve should be replaced if any of the following occur: • The outlet pressure remains above the set point or fluctuates • NOTE: The manifold regulation should stabilize after about 20 seconds and stay within +/- 10% of the set pressure setting • The regulation setting cannot be adjusted • The valve will not open to allow main gas flow • The gas valve has been subjected to water flooding • NOTE: When servicing a gas furnace it is important that the inlet and the outlet pressures be checked with an accurate pressure gauge • You cannot visually look at a main burner flame to determine if the pressures are within the manufacturers specifications • Always check the gas valve with a water and soap bubble solution after servicing to ensure there are no leaks
Rated Valve Capacity • Range of Regulation: • Is the minimum and maximum BTU/Hr capacity of the valve to maintain regulation pressure settings. Pressure Drop: Pressure differential is the agency rated amount of gas (BTU’s) that can pass through the gas valve based on inlet and outlet pipe size.
Application By Opening Characteristics Note: These are Typical Family Model Numbers. Verify Specific Type Numbers Before Replacing A Control.
Universal Valves You Should Not Be Without 98% of Furnaces manufactured in the last 10 years can be repaired using the “J” valves listed above!