Check resistance of water sensors and compare E18 (will require a manual reset once the condition has been corrected.
If operating on nimbus sans bold font something other than an outlet sensor, check temperature setting of the main control board.
Operation - Faulty pump relay.
Burner Did Not Light (contd) (will require a manual reset once the condition has been corrected.
Lower the system pressure below the 150 PSI rating of the supplied relief valve.Turn company manual policy quality assurance power off to unit, wait 30 seconds and then turn power back.Check for closed valves or obstructions in the boiler piping.Press the reset button on the display to reset.) The inlet sensor is open.And LP gas pressures should be between 8-14 inches.c.No Pump - Faulty pump.

When the circuit is complete, 24V energy will flow continuously.
Future Proofing Most states have outlawed the old fashioned mercury blob thermostat.
Check BMS parameter settings.
Make sure wiring is connected and not damaged.
To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles.B06 120 vac input to the main control board has dropped below 80 vac.Faulty pump relay.Correct the supply gas pressure if necessary.If the pressure change does not occur, the gas valve is not opening.Replace fuse F2 on the control board Either the optional flow switch or the optional low water cutoff is not making.Faulty O-temp heat exchanger switch.E15 (will require a manual reset once the condition has been corrected.Check condensate tube from unit to floor drain for proper installation and obstructions.If it is yellow, burner is not getting enough liteon usb wireless lan driver update xp air.If the system pump is a variable speed pump, ensure that the system flow is not less than the boiler flow.Verify that the vent/air intake pipes are correctly installed and that there are no obstructions. If you have heat and AC, youll need 18/5.

Refer to Section 2 - General Venting of the sync Installation and Operation Manual for proper lengths.
If 120 VAC is present on a call for heat and the boiler pump is not operating, replace the pump.
First time i tried to use A/C.