I've got a small powerflame gas burner m/nbcjr30a-12.
It has a Fireye ep160 programmer and a ed160 display module. When i first took the call the burner was going into alarm, but the display on the module was fuzzy/blank and could not read it. I reset the burner and was able to get it to light off but the honeywell mod motor m9174c1025p seemed to be acting up. I shut down the system because the exspansion tank bladder was shot and i wanted to replace the display module. I went back to the site today and installed the new module. When i powered it up the burner motor would turn on, but my display would read "hold purge d-8 limit open" the entire cycle untill it locked out on purge d-8 limit open. No purge timer or anything. I have 120v power to my mod motor and 24v on the secondary but no movement in the linkage. Double checked all connections and didn't find anything wrong. I don't work on boilers everyday so any help would be appreciated. Does it sound like a bad mod motor or something with the programmer. TIA Fitz