Genuine Siemens Photocell QRB1B A050B70A 65320082 The photocell is an essential part of any central heating system. The photocell is used to monitor the ongoing flame in the burner unit. When the flame goes out due to failure the photocell…View more
Genuine Siemens Photocell QRB1B A050B70A 65320082 The photocell is an essential part of any central heating system. The photocell is used to monitor the ongoing flame in the burner unit. When the flame goes out due to failure the photocell will send a command to the control box to power down the unit.