36J55-214 – FURNACE GAS VALVE (1/2″ x 1/2″, 2-STAGE, SLOW OPEN)

White-Rodgers 36J Series two-stage, slow-opening combination gas valve for 24 VAC furnaces using hot surface ignition (HSI) or direct spark ignition (DSI). Pipe size is 1/2″ x 1/2″ NPT straight through with inlet and outlet pressure taps, and both an LP conversion kit and reducer bushing kit are included. The two-stage regulator is factory set at 1.5″ W.C. low fire and 3.5″ W.C. high fire on natural gas. The manufacturer states this valve is not for standing pilot, intermittent or proven-pilot systems.

Specifications published by the manufacturer. Source: manufacturer documentation.

Specs

• SeriesWhite-Rodgers 36J HSI/DSI
• Ignition SystemHSI / DSI - NOT for standing pilot, intermittent or proven pilot
• Voltage24 VAC, 50/60 Hz
• Stages / Opening2-stage, slow open
• Pipe Size (inlet x outlet)1/2" x 1/2" NPT, straight through
• Total Current0.43 A at 24V
• Regulator Setting1.5" W.C. low fire / 3.5" W.C. high fire (natural gas)
• Natural Gas Adjustment Range1.0" - 4.0" W.C. low, 2.0" - 5.0" W.C. high
• LP Adjustment Range4.0" - 10.0" W.C. low, 6.0" - 12.0" W.C. high
• Capacity (1" drop, natural)140,000 BTU/hr
• IncludedLP conversion kit and reducer bushing kit
• Maximum Pressure1/2 PSI
• Ambient Temperature-40 F to 175 F
• MountingAny position

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 103181-01
• 77W04

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Can I put any 24 volt gas valve on my furnace?

No. The ignition system has to match. A standing pilot valve, an intermittent pilot valve and an HSI or DSI valve are built differently inside, and the manufacturers state plainly that they are not interchangeable. A standing pilot valve has a pilot outlet and a thermocouple circuit. A hot surface ignition valve has no pilot at all and expects the board to prove flame through a sensor. Substituting one for the other either will not run, or runs without proving flame, which is the part that matters.

What is the difference between 24 volt and millivolt?

A 24 volt valve needs a transformer and a control circuit. A millivolt valve runs on roughly 750 millivolts generated by a thermopile sitting in the pilot flame, with no outside power at all. They look similar on the shelf and they are not swappable. If the appliance has no transformer anywhere in it, it is millivolt.

Single stage or two stage?

A two stage valve has two regulator adjustments and two 24 volt hot terminals so the board can fire low then high. Hang a single stage valve on a two stage furnace and you lose low fire and usually pick up board faults. Bring the old valve or the furnace model number.

Can I convert a natural gas valve to LP?

Only with the manufacturer's kit for that furnace, and the kit is more than a spring - you replace every burner orifice and reset the regulator. Ballpark manifold pressure is about 3.5 inches water column on natural gas and about 10 inches on LP high fire, but the rating plate is the number that counts. Most of DFW is on Atmos natural gas, and LP mostly turns up out past the county lines.