ErrorHelp.us

Heating  Heating

Brand

U.S.Boiler Company U.S.Boiler Company List all brands

Type:

MPO-IQ147 view MPO-IQ147 List all types

Error code:

ErP34
List all errors


Error code: ErP34

Cause of error code ErP34

CAD Ohms Permanently Low (flame out of sequence)

Solution for error code ErP34

The cad cell is permanently in a low resistance state.  It should typically read much higher than 20,000 ohms when no flame is present.
-Set the display to display cad cell resistance.
-Shield the cad cell from light
If the display shows less than 20,000 ohms, unplug the cad cell,
If display does not read 999999 ohms, replace control,
If it does read 999999 ohms, replace cad cell.


Share this page: Facebook Twitter





© 2025 ErrorHelp.us