Bosch BGH96 - Figure 14; High Fire Pressure Switch; Low Fire Pressure Switch; Overflow Pressure Switch

Troubleshooting Guide Bosch 96% AFUE Gas Furnace | 15
BTC 770502101 A | 01.2019
Data subject to change
3 Flashes (Low Pressure Switch Stuck Open)
6 Flashes (Pressure Switch Cycle Lockout)
13 Flashes (High Pressure Switch Stuck Open)
Figures
The pressure switch that you are checking in this step depends
on the number of LED fl ashes. Refer to the specifi c fl ashes and
their descriptions above.
Figure 14
High fire pressure switch
Low fire pressure switch
Overflow pressure switch
Figure 15
1. Check for 0Vac between these two terminals with multi-meter.
1
Figure 16
1. Check pressure hose for proper operating condition.
Check for proper hose connections.
Check and remove any blockages in the hose.
1
Figure 17
High fire
pressure switch
Low fire
pressure switch
1 2
Check to see if the pressure at pressure switch is correct by
removing the hose and measuring with a manometer.
(1) Low Pressure Switch Set Point: 0.55 in. WC
(2) High Pressure Switch Set Point: 1.1 in. WC