American Dryer Corp. Hot Surface Ignition System ADG-530 - Manual (Page 15)

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(2) With a meter (either a multimeter or ohmmeter) set on the 200 ohm position,
place the meter leads across:
(a) Terminals 1 and 2...the reading should be approximately 96 ohms +/- 5 ohms.
(b) Terminals 2 and 3...the reading should be approximately 96 ohms +/- 5 ohms
also.
(3) If, after checking the resistance values on the gas valve it is determined that the
ohm readings do not approximate the ohm values listed above (96 ohms
[+/- 5 ohms] for both readings respectively), then, the gas valve must be
replaced.
36E Redundant Gas Valve
4) HSI (Hot Surface Ignition) 24 VAC Redundant Gas Valve
IMPORTANT: The HSI 24 VAC Redundant Gas Valve contain no serviceable parts.
REPLACEMENT COILS ARE NOT AVAILABLE.
IMPORTANT: THERE ARE NO PARTS AVAILABLE FOR FIELD REPAIR. Replace
gas valve only with exact model and/or type number as noted on gas
valve.
a ) The redundant gas valve utilize 24 VAC, which is provided by the HSI module.
(1) To check the resistance value;
(a) Disconnect the terminations at the gas valve from the HSI module.
WARNING: When taking ohm readings, the terminations from the HSI module must be
disconnected/removed, otherwise, the readings obtained will be incorrect
and/or erroneous.