For Northernheat
Still getting code of 8 led flashes. Have checked the flame sensor not cracked or touching anything and is in the flame. The only time that it seems to happen is when the temp gets colder like 32/34 after being 38/40. The LED error code states Internal control fault Micorprocessor has sensed an error in the software or hardware. If error code is not cleared by reseting unit power, replace the IGC. But it does reset when the power is turned off and back on . And works okay until the temp changes colder.