Weil mclain heII-4 short cycles burner com...

Make sure the exhaust fan is pushing out hot air and not obtstructed. Check the pilot assembly, clean ane make sure the sensor is well into the flame. Watch the flame to see if all burners are igniting. If not, clean the burners and the flame tray that spreads the flame to all of them. Look for a sensor at the farthest burner and make sure the probe is free of carbon and the wiring is tight.