The control module may have lost flame signal — if so, boiler should restart. • If blower assembly replacement is unsuccessful, replace control module. Inspect flame per procedure in Ultra Boiler manual, at low fire and high fire rates. • Replace low voltage wiring harness if problem persists. Possible loose connector on boiler outlet sensor. When not busy learning about homes and appliances she's sharing that knowledge. Weil-McLain boilers are some of the most popular and reliable boilers on the market today. If problem persists, replace control module. It locks out frequently especially on cold nights (in New England). Lately it has been having ignition problems. Blower running on high, and F1 fuse blown? Weil-McLain tankless heaters are rated at 200 °F boiler water temperature. Are room thermostat and DHW aquastat satisfied? 1. — Burner off for 150 second wait (plus 1 additional minute for each failed attempt, up to 20 times, then hard lockout occurs. Measure the resistance of each of the sensors. Possible strong wind blowing against vent turning blowrer wheel, correct venting. The median repair cost for a boiler not covered by a service contract was $287. If these troubleshooting techniques do not solve your problem, or the problem is not listed here, contact a qualified Weil McLain technician to handle the problem for you. • … • If wiring is correct, replace blower assembly. Maximum setting 220° F. Have qualified service technician repair leaks at once to avoid constant use of makeup water. Boiler went through 2 ignition attempts and never detected flame A fault has occurred in the control hardware. Low voltage terminals 6 and 7. Follow procedure in Ultra Boiler manual to check igni- tion electrode wiring and inspect and clean the ignition electrode. Call a repair... Boiler Turns On and Off Frequently. Insufficient water pressure will prevent the boiler from creating enough hot water to adequately... 3. Continual fresh ceptable, check combustion values. If you have been adding make-up water frequently, have the technician check for mineral deposit and assess the pH level of the water in the boiler. If fuse blows again recheck wiring per diagram. Tighten any loose valves. A: Weil-McLain does not employ heating technicians who visit and repair boilers, nor do we have factory-authorized servicers. We rely upon independent heating professionals to install, maintain and troubleshoot Weil-McLain products. Inspect wiring and high voltage terminal strip for defects. means the display shows the measured boiler water temperature. If yes, then boiler should be off — there is no call for heat. Move the vent to a less windy location. Check for leaks if you add make-up water more frequently than usual. If neces-sary, turn off power and remove one of the DHW aquastat wires to ensure boiler will not receive a DHW heat call. If blowrer does not run, replace the blower. Page 35 NOTE: Series 1, Ultra-155 or Ultra-230 only — Examine plug seals. 3. Wall Mount Gas-Fired Condensing Boilers-Combi and Heating Only Models. Possible loose connector on boiler outlet sensor. Check all of the boiler's valves. Domestic water from tankless heater is hot then suddenly turns cold. • Verify high altitude settings have been changed for installations 5,500 ft above sea level. Unplug connection at sensor and at Sola and check continuity between ends. Occurs when flue temperature sensor exceeds 216®F. Cycle power off and on using boiler power switch and check for operation. Boiler Out temperature has exceeded the Boiler In temperature by more than 58°F. This might happen if the vent is facing a very windy side of the building. • Turn on service switch to power boiler. The unit will start its ignition cycle, but there will be no flame. Thermostat installed where drafts or heat affect reading. Verify manual gas valve in boiler is open. Occurs when a temperature sensor has electrically shorted or has become disconnected. • Replace control module if harness replacement doesn’t resolve. Automatically resets when sensors are within 6°F. Look for signs of moisture, corrosion in the venturi or water dripping from the burner. Check all of the boiler's valves. If 120VAC is present, remove low voltage wiring harness. Replace control module if harness replacement doesn’t resolve. Turn up thermostat or aquastat. but did not exceed 225 °F (hard lockout occurs above 225 °F — Burner off for 150 second wait. Check low water cut-off, limit controls, etc. If desired, you may disable the space heating circulator during the warmer time of the year. Check pipe size and circulator capacity. Your circulator may be too small or damaged to pump sufficiently. If the boiler water temperature is NOT above parameter 4, the control may have lost flame signal. The number shown will not necessarily be 180. 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