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Dunkirk Q90-50 boiler & storage tank Parts
Here are the diagrams and repair parts for Dunkirk Q90-50 boiler & storage tank, as well as links to manuals and error code tables, if available.
Installation guide
Owner’s manual
Error Codes
By Schematic
SELECT DIAGRAM
Browse Parts for Q90-50 Boiler & Storage Tank
Mixer/air pressure switch assy diagram
Mixer Gasket
Part #146-31-025
The manufacturer no longer makes this part, and there's no substitute part
Boiler block/piping assy diagram
Cover Plate
Part #740-00-4004
The manufacturer no longer makes this part, and there's no substitute part
Jacket/base assy diagram
Bushing
Part #146-31-120
The manufacturer no longer makes this part, and there's no substitute part
Mixer/air pressure switch assy diagram
Gasket
Part #146-31-023
The manufacturer no longer makes this part, and there's no substitute part
Jacket/base assy diagram
Wiring Harness
Part #146-31-315
The manufacturer no longer makes this part, and there's no substitute part
Mixer/air pressure switch assy diagram
Brass Barb Fitting
Part #146-31-308
The manufacturer no longer makes this part, and there's no substitute part
Jacket/base assy diagram
Plug 3"
Part #146-31-175
The manufacturer no longer makes this part, and there's no substitute part
Boiler block/piping assy diagram
Aquastat
Part #146-31-324
The manufacturer no longer makes this part, and there's no substitute part
Mixer/air pressure switch assy diagram
Air Baffle,k9050
Part #425-31-102
The manufacturer no longer makes this part, and there's no substitute part
Mixer/air pressure switch assy diagram
Screw 10-32x3/8"
Part #146-95-809
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for window air conditioners
Choose a symptom to see related window air conditioner repairs.
Main causes: clogged drain hole, air conditioner not leveled properly…
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals …
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor…
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure…
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor…
Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure…
Repair guides for window air conditioners
These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.
How to replace a window air conditioner user interface control board
Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace i…
Repair time and Difficulty
30 minutes or less
How to replace a window air conditioner condenser fan
If the condenser fan blade is broken or the condenser fan motor won’t run, you can replace the broken parts yourself by…
Repair time and Difficulty
90 minutes or less
How to replace a window air conditioner ambient thermistor
If your window air conditioner isn’t cooling properly, it might need a new ambient thermistor. You can replace it yourse…
Repair time and Difficulty
45 minutes or less
Articles and videos for window air conditioners
Use the advice and tips in these articles and videos to get the most out of your window air conditioner.
Learn how to tell whether a fuse is blown…
Find out how to protect your smart appliances from malevolent invasions by hackers.…
Browse this list of questions we hear from our Sears PartsDirect customers most frequently, to see if we have the answer…
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