Flashes (Low Pressure Switch Stuck Open); Flashes (Pressure Switch Cycle Lockout); Flashes (High Pressure Switch Stuck Open) - Bosch BGH96 Troubleshooting Manual

1 4 | Bosch 96% AFUE Gas Furnace

3.4 3 Flashes (Low Pressure Switch Stuck Open)

6 Flashes (Pressure Switch Cycle Lockout)

13 Flashes (High Pressure Switch Stuck Open)

Troubleshooting Chart
Data subject to change
Start
Are there any
loose wires or wrong Yes
connections?
No
Is
the pressure
switch closed?
Yes
See Figure 14
& 15.
No
Is
there blockage
in the pressure hose or
Yes
is the hose loose?
See Figure 16.
No
Is there
blockage in the
Yes
exhaust pipe?
No
Is the
pressure at the
No
pressure switch correct?
See Figure 17.
Yes
Replace
the
pressure
switch
Correct wiring
according to
the wiring
diagram
Replace
the
PCB Board
Remove
blockage or fix
the pressure
hose
Remove
blockage in the
exhaust pipe
Replace
the
inducer
Troubleshooting Guide
01.2019 | BTC 770502101 A