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Model OFE/OFG/OEA/OGA-341, 342
1-4. ERROR CODES
(Continued)
DISPLAY CAUSE PANEL BOARD CORRECTION
“E-20 A” Vacuum Press the timer button to try the ignition process again,
switch failure and if “E-20 A” persists, check the air switch per Vacuum
(stuck closed) Switch Section
“E-20 B” Draft fan or Press the timer button to try the ignition process again,
vacuum and if “E-20 B” persists, check the vacuum switch per
switch failure Vacuum Switch Section or the blower motor per Blower
(stuck open) Motor Assembly Section
“E-20 C” Ignition modules Press the timer button to try the ignition process again; if
not responding “E-20 C” persists, check the ignition module per Ignitor
Module Section, the spark ignitor per Pilot/Ignitor
Assembly Section, or the I/O board per Control & I/O
Boards Section
“E-20 D” Pilots not lit or Press the timer button to try the ignition process again; if
no flame sense “E-20 D” persists, check the ignition module per Ignition
Module Section, the I/O board per Control & I/O Boards
Section, or the flame sensor per Flame Sensor Section
“E-47” Analog converter Turn switch to OFF, then back to ON; if “E47” persists,
chip or 12 volt replace the I/O board, or the PC board; if speaker
supply failure tones are quiet, probably I/O board failure
“E-48” Input system Replace PC board
error
“E-70” Faulty power Check power switch, along with its wiring;
switch or switch replace I/O board if necessary
wiring; faulty I/O
board
“E-92” 24 VAC fuse Check for shorted component in 24 volt circuit;
on I/O open (i.e., high limit, drain switch, vacuum switch)
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