Condition
- Boiler safety limit wired to J5-1 are open
- Low Water Cut-Off
- External controls wired to External limits
Possible Cause
- See possible cause for hard lock-out 4
- Loose wiring to limit device
- External limit defective or jumper not installed
- Yeallow light of LWCO on due to low water
- Nether light on LWCO is on, check for defective harness
