Coleman Evco Furnace Model #DGAT0908DD

[quadkmom]

Help have 4 blinks of the error light.  Do not have owners manual. What does this code mean?  Sticker says "Limit Cycling". 

[jb8103]

Does the big ol' blower ever come on?

[Daveb1972]

Have you changed the filter?

[jb8103]

Probably got a filter stuck in the blower.

[ACtechGUY]

I'll agree with both JB and DAve.  A limit cycling is typical of some sort of airflow problem. 

 

#1 filters filters filters.... is it dirty?, is the filter that came in the furnace still there 5 years later? Do you have one of those expensive "Alergy" or washable filters? if so they can really restrict airflow.

 

# 2 are any air outlets blocked off or closed? is the return air blocked in some sort of way? 

 

# 3  the evaporator coil is clogged with dirt .