I tried to send the manual via email but it failed. Is the email in your profile correct?
Originally Posted by mrlighturfire
This unit should have a slow flashing green light for normal operation, and a Slow flashing amber light under normal operation with a call for heat.
4 Flashing Red light is the primary or auxiliary limit switch has opened its normally closed contacts. With this fault code the control will operate the supply air blower and inducer.
Instead of learning the tricks of the trade, learn the trade.