Rapid Flashes (Low Flame) - Bosch BGH96 Troubleshooting Manual

Troubleshooting Guide

3.7 Rapid Flashes (Low Flame)

Troubleshooting Chart
Start
Is the
manifold gas
pressure requirement
being met? See
Table 1
Yes
Is the
flame sensor dirty
or broken?
No
Is the
PCB Board
grounded properly?
See Figure 11
No
Properly
ground the
PCB Board
BTC 770502101 A | 01.2019
Is the
inlet gas
No pressure requirement
being met? See
Table 2
Clean with
steel wool or
Yes
replace the
Flame Sensor
Are
orifices
blocked or clogged?
Yes
(check burners)
Yes
Remove
the
blockage
Adjust the gas valve
to ensure manifold
gas pressure meets
the required values
Yes
No
Adjust the
inlet gas
pressure
Replace
No the
PCB Board
Bosch 96% AFUE Gas Furnace | 21
Replace the gas
valve if the
pressure cannot
be adjusted
Data subject to change