Access & passwords: Combi Boiler tips

Short, practical technician tips on access & passwords for combi boiler. Check each one against the manual for your exact model before acting.

Enter the parameter menu (PL 0)

FlowMax · FLOWMAX-120 condensing combi

Power-up button combination that opens parameter selection; the display shows PL and 0 when it is ready.

1. Switch the ON/OFF switch to OFF.
2. Switch it back ON while holding the + and - buttons.
3. Release both buttons when PL and 0 appear.
4. Hold S and press + to choose a parameter number, release S, then press S again to see its value.
5. Change the value with + or -, press S to confirm, then switch the unit off and on to apply it.

Change installer parameters (password 1234)

Navien · NCB-250/150H, NCB-240/130H, NCB-240/110H, NCB-190/080H, NCB-190/060H

Installer parameters sit behind a password in the service menu.

1. Hold Back + Menu for 3 seconds and open 3. Parameter Settings.
2. Enter password 1234.
3. Edit the value; it saves after 10 seconds with no input.

Open the service / installer menu (Back + Menu)

Navien · NCB-250/150H, NCB-240/130H, NCB-240/110H, NCB-190/080H, NCB-190/060H

Hidden menu reached by holding Back and Menu; it holds parameter settings, test mode, special operations and air purge.

1. Hold Back and Menu together for 3 seconds.
2. Choose the entry with the Command dial (3. Parameter Settings, 6. Test Mode, 7. Special Operations, 8. Air Purge Mode).
3. Press Back to leave.

Open the parameter settings menu on the PC board

Rinnai · Rinnai I-Series Plus boilers and combis (150K and smaller, 175K and higher)

Installer menu for changing boiler parameters; only change what an instruction tells you to change.

1. Remove the front panel; the PC board is at the lower left.
2. Press and hold the left SW1 button for 5 seconds.
3. Use the up and down arrows to scroll to the parameter, then press Select.
4. Change the value and press Select to store it.
5. Press the left SW1 button to leave the menu.