16
Intergas Control PCB / Internal Error

Boiler shows code 16, erratic behavior of display and controls

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty main PCB, Voltage spikes or poor supply quality, Internal memory corruption, Moisture ingress on PCB

How to Fix / Troubleshooting

Safety first: Isolate power before accessing the electronics compartment.

Steps:

  • Power reset: Turn off the boiler at the isolator for at least 60 seconds, then restore power and observe if the fault clears.
  • Check supply voltage: Verify that the mains supply to the Intergas boiler is within specified limits and that polarity and earth are correct.
  • Inspect PCB: Look for signs of moisture, corrosion, or burnt components on the main PCB. Ensure all connectors are firmly seated.

If code 16 persists, the main PCB will likely need replacement. This should be done by a qualified technician who can also check for underlying causes such as water leaks onto the electronics.

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Repair Difficulty

Hard 4/5

Required Part

Intergas main PCB
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