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Power venter improperly wired. 2. Main burner did not light on call for heat. 3. Defective control board. 4. Loss of pressure. Pressure switch not made. 1. Check power venter circuit per wiring diagram. 2. Heater is in lockout mode check flash code table for problem. 3. No flash codes present along with no call for heat, replace control board. 4. Check venting for blockage. Check tubing for blockage or hole. Check spud for blockage. 36 Table 10A - Troubleshooting with LED Indicator Assistance fo