Why is my brand new heater giving me Error 01 or Error 02 codes?

This is almost always related to issues with fuel delivery. Be very careful if using the prime feature that you do not over-prime the heater. On initial install, the heater may give Error01 codes as fuel has not yet reached the heater, so pull the fuse and attempt to start again, and it should fire on the second or third attempt once fuel reaches the heater.

Error 01 Error 02 Systematic Troubleshooting Video

Velit Heater Error Code Guide