Limit circuit open or External Load on "W" Nordyne/Intertherm M3RL080A
Posted on by
Limit Circuit Open. Limit circuit open or External Load on "W" Nordyne/Intertherm M3RL080A Here is what I have done so far (most as part of general service): Changed 2 x limit switch Changed Pressure switch Changed ignitor Changed flame sensor Changed board Anyone any ideas with these furnaces as to why it would still throw this code after this? Unplug the connector and check the resistance, pins 1 and 7 on XB80
A foldback currentlimit circuit with loadinsensitive quiescent from www.semanticscholar.org
Blower will run for 4 min or until open switch remakes whichever is longer status code #4 continues to flash until blower shuts off.
A foldback currentlimit circuit with loadinsensitive quiescent
It is a bad circuit board either not sending 24v to the limit circuit, OR it does not recognize the 24v returning back from the limits If you verify ALL limits are closed..and it still codes, then you have a bad control board These safety devices are wired in series and the best way to locate them is to follow the purple wires.
Limit Switch Wiring Diagram / Limit Switch Working Principle Your. Troubleshooting steps for Goodman Furnace 4 Flash Code (Primary Limit Circuit Open) As I mentioned earlier, if your Goodman furnace is displaying a 4 flash code, indicating that the primary limit circuit is open, there are several potential causes for this issue LIMIT CIRCUIT FAULT (Status code 4) Indicates the limit, draft safeguard, flame rollout, or blocked vent switch (if used) is open
examples of open circuit Archives Electrical Volt. Now here is the final possibility.there are times where it is not actually an open limit Blower will run for 4 min or until open switch remakes whichever is longer