Help with furnace limit switch issue
Hello Everyone, need some input here diagnosing an issue with my single-stage York furnace.
Symptom - furnace runs and raise the temperature by a few degrees (produce heat for maybe 45 mins), and then for a brief moment the blower stops and restarts but only cool air comes out of the registers. The blower would continue to run for maybe 30 mins until it produces heat again. During the time in which cool air blows out, the panel displays 4 red flashes error code.
The filter was changed just a couple of weeks ago and still in good shape. After looking online it appears to point to one of the three limit switches (main limit switch, inducer limit switch, the flame rollout switch) might be the issue. Anyone have experience with this? Does it sound like the switch is doing what it's supposed to or seems faulty? Any input or help is appreciated!
Symptom - furnace runs and raise the temperature by a few degrees (produce heat for maybe 45 mins), and then for a brief moment the blower stops and restarts but only cool air comes out of the registers. The blower would continue to run for maybe 30 mins until it produces heat again. During the time in which cool air blows out, the panel displays 4 red flashes error code.
The filter was changed just a couple of weeks ago and still in good shape. After looking online it appears to point to one of the three limit switches (main limit switch, inducer limit switch, the flame rollout switch) might be the issue. Anyone have experience with this? Does it sound like the switch is doing what it's supposed to or seems faulty? Any input or help is appreciated!