P00012B Espar fault code

To prevent the heater from locking out in the future, wait 3–4 minutes between each startup attempt.

If 12B is the only code displayed, follow these steps:

1. Delete the code and try running the heater again.

2. After the attempt, remove the 20 A fuse for the heater and wait 20–30 seconds.

3. Reinsert the fuse and turn the heater off using the controller.

Alternatively, you can perform a factory reset using the EasyStart Pro controller. This option is found in Workshop mode and should be used only as a last resort.