
Troubleshooting
Step 3 Components
Troubleshooting
Step 3 Components
Ignition Cable-Check for continuity
through upper ignition cable
Upper Ignition Module
Input Voltage Check Output Voltage Check
Power -
24 VAC across R & GND
from right side transformer
24 VAC across V1 & V2 to
upper gas valve
--
Diagnostic LED
Flash indication will occur once immediately after the failure.
1 flash = Powering on
2 flashes = Have flame, but no call from heat across TH & GND
3 flashes = Ignition Lockout ( only after 2 unsuccessful attempts to
ignite and sense flame).
4 flashes = Valve relay lockout (indication of internal module
failure)
15 second ignition attempt
5 second inter purge
Sparking will stop if flame sense measures above 0.7 micro amps
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