My monitor heater is 3 years old and has never had a problem since installed. It is now giving an E 13 error code. Where should I start when trouble shooting? I have 2 other monitors that come off the same fuel supply line, this is the first in the series. Any idea where to start?

Exact model number?

Somewhere in your owners manual it should describe what an E 13 error code means. What does that say?

Monitor 2200, how do I fix a code E 13?