Consult a gas service person to test and change the thermocouple. Remove thermocouple and try to get a exact replacement part. The appliance area must be kept free of all combustible materials, gasoline and other flammable vapors and liquids. All such costs must be borne by the Purchaser. Or the gas control valve might be by-passing gas when off causing the burner to stay on even when the demand is off. Location of pressure tap 3. Gas pressure too low Very low gas pressure may be caused by low delivered gas pressure, a jammed gas regulator or undersized gas lines.
If you are trying to bleed air out thru pilot assembly this can take a long time because the opening in pilot orifice is very small. Water valve parts may be dirty or components damaged. Open your hot water taps. Position the gas control slide to the single flame when a hot water faucet is opened. Pilot Flame: The pilot flame should burn with a clean sharp blue flame and should resemble the diagram in Fig 8.
Jun 09, 2018 1 Call whirlpool 1-877-817-6750 Need model and serial number located on label on side of tank 2 Copy following links for troubleshoot and repair resources, including service manual by type of gas control valve. Before calling service technician, open following link for Bosch tankless troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician. Page 13 Components and Parts List. If the burner is still on try banging on the water heater with your hand and see if the burner shuts off completely. In fact each site says repeatedly to call service technician for installation and repairs. With the control knob set fully clockwise and strong hot water flow rate, run the unit for at least 10 minutes.
However when the water valve opens,and gas enters the burners, the pressure could drop sharply, causing the pilot flame to go out. . When you first smell gas immedieatly tighten fitting. . Ok the way this system works is from a pressure and flow switch.
Installation must comply with national fuel gas code venting requirements for a 117,000 Btu Category I appliance and any applicable local codes. Check the tightness of the thermocouple connection nut at the electromagnet: The Electro-magnetconnection is a large aluminum 17mm hex head nut. AquaStar 125B Technical Specifications With more than 25 years of experience selling tankless water heaters, Controlled Energy Corporationprovides unmatched knowledge and service to its customers. If it does the gas control valve might be by-passing. Pull main cover out toward you and lift up and out. In such cases when mixing cold water at the tap, the lower hot water pressure may be overpowered by the higher cold water pressure in the building, which may cause the Aquastar burners to shut down deactivate. Simultaneous operation of other appliances such as exhaust fans, ventilation systems clothes dryers, fireplaces or wood stoves could create a vacuum effect in your home which could cause dangerous combustion by-productsto spill back into your home rather than venting to the outside through the flue.
Be certain there are no loose particles or dirt in the piping. Identification labels are found on the shipping box, and on the rating plate which is located on the right side panel of the cover. Temperature aquastat control is set too high If unit is plumbed in a recirculating loop system the aquastat temperature relay for the primary circulator pump is possibly set too high. Page 9 About Water Temperature. The appliance must be located as close as practicable to a chimney or vent. Every 3-5 years replace component 23 on page 19. Temperature Selection too high pressure drop in the AquaStar water valve assembly — i.
Vent blockage could occur during ice storms. Pull the air screen off, wash it and blow any lint off See Fig 9. Page 5 Mounting the Heater. The crossover will create a back pressure in the system preventing the pressure drop in the Aquastar i. If however, the heater is used at the higher temperature settings and the water has a high mineral content, periodic descaling may be necessary.
Advertisement Print version Many people prefer to read the documents not on the screen, but in the printed version. Faulty thermocouple part 8747202083 or electromagnet Unless these 2 parts are at least 8 to 10 years old, it is very unlikely that they are faulty. Clogging of the pilot burner can be caused by dust and any suspended matter contained in the ambient air. . If the length varies don't worry about that. To do this, remove incandescent particle tray and unscrew the central screw located at the bottom of the front cover. First check that the venturi is free from dirt particles.
. Before you do this make sure there are no standing piloy lights or other sources of flame in the vicinity. Do not use this item for any installation or repair of potable water applications. More make up air is the solution. Bosch Aquastar 125B Gas Tankless Water Heater Repair Parts for heaters produced After February 2003. Read the safety information above on this plate. Remember that water pressure must be sufficient to activate the heater when drawing hot water from the top floor.