Bosch BGH96 - Page 11

Troubleshooting Guide Bosch 96% AFUE Gas Furnace | 11
BTC 770502101 A | 01.2019
Data subject to change
7 Flashes (System Lock-Out due to Failed Ignition)
8 Flashes (System Lock-Out due to too Many Flame Dropouts)
Figures & Tables
Figure 8
1. Check for 9-17Ω between these two terminals with multi-meter.
1
Figure 9
1. Check for 115Vac power supply between IG and IGN with
multi-meter during preheating sequence.
1
Manifold Gas Pressure
Natural Gas 3.5 in. W.C.
Propane Gas 10 in. W.C.
Table 1 Manifold Gas Pressure
Figure 10
1. Check for 18-31Vac power between “M/HI”&”C” terminals with a
multi-meter
1
Figure 11
1. Check for proper grounding (green wire).
1
Inlet Gas Supply Pressure
Natural Gas Minimum: 4.5 in. W.C. Maximum: 10.5 in. W.C.
Propane Gas Minimum: 11.0 in. W.C. Maximum: 13.0 in. W.C.
Table 2 Inlet Gas Supply Pressure