De Dietrich 81994924 6-pin connector

The De Dietrich 81994924 is a 6-pin connector listed under plugs and connectors. In a boiler or burner system, connectors of this type carry low-voltage control signals and mains supply between the control board and components such as the burner control, gas valve, fan, or sensors. They are matched by pin count, pitch, and keying rather than by function; a 6-pin connector from one series is not interchangeable with a 6-pin from another series even if the pin count is the same. When replacing such a connector, the key selection parameters are the connector series and pin count, conductor cross-section, insulation temperature class, cable length, and terminal type. A poor contact in any connector can reproduce almost any electrical fault symptom—intermittent lockouts, false flame signals, or erratic modulation—so connectors are a routine suspect during fault finding. No specific dimensions, voltage ratings, or compatibility information is available for this article beyond its identification as a 6-pin connector by De Dietrich under codes 81994924 and 336.640.005.