Mr heater big maxx 2 blinking error code

[Justin1110]

I set up my new big maxx heater and it will light but only stay lit for about 45 seconds or so. It will then shut off and try again after a little while. Once it shuts off again it will go into lockout with a 2 blinking light error code. 2 flashs = system lockout, failure to detect or sustain flame. Any ideas on how to fix it?

 

[Showkey]

Sounds like flame sensor not confirmed. Since new install was:

Gas pressure checked during install ?

There was another recent post with similar issue.