T pieces to connect inline with hoses and manometer can be purchased through spare parts
T piece pressure switch fitting Pt# 628806
Pressure switch Tube 5mm ID*10mm Pt# 814803
IMPORTANT!!!!!
When using a manometer on a modulating heater the pressure switch must be kept in circuit to ensure an accurate reading (if the pressure sensor is not in circuit the fan will continue to ramp up to try and achieve the desired pressure, but because the sensor is not in circuit will never get there). This is done by fitting a temporary T-piece (Pt# 628806) and pressure switch tube (Pt# 814803) in the suction line.
Check the ICS wiring loom plug connection:
Ensure the brown wire (circled below) is securely connected and not causing a poor electrical connection. In some cases, the pin associated with the brown wire may need to be gently pulled through to fully engage, similar to the other pins in the plug.
Ensure the large white plug is making a secure electrical connection, particularly at the pin connected to the brown wire.
Fault code history can be accessed:
SETTINGS/SERVICE/GAS HEATER 01/7378 CONT/FAULT LOG
YouTube Video - MagIQtouch Heater Fault Log
