Keurig B40 Repair Manual

The Keurig B40 is a single-serve coffee brewing system featuring a 48-ounce removable water reservoir, programmable auto on/off, multiple brew sizes, descaling mode, and energy saving features. This repair manual covers disassembly, troubleshooting, common issues, and maintenance procedures for the B40 model. Below are key sections for safety, features, disassembly, troubleshooting, maintenance, and parts replacement.

1. Features at a Glance 2. Safety Precautions 3. Disassembly Procedures 4. Specifications 5. Tools Required 6. Common Issues & Solutions 7. Maintenance Procedures 9. Parts Replacement 10. Reassembly Guide 11. Regulatory Information 12. Troubleshooting

Features at a Glance

Key components: Brew chamber assembly, water reservoir, heating element, pump system, control board, drip tray, and power supply.

Feature	Description
Brew Chamber	Needle assembly for piercing K-Cup pods
Water Reservoir	48-ounce removable tank with handle
Heating Element	1500W heating system for rapid heating
Pump System	Magnetic drive pump for water delivery
Control Board	Microprocessor for brew size and temperature control
Drip Tray	Adjustable height with removable drip pan
Power Supply	120V AC, 60Hz operation
Brew Sizes	6oz, 8oz, 10oz programmable options
Descaling Mode	Automatic cleaning cycle for mineral buildup
Energy Saving	Programmable auto on/off feature

Safety Precautions

Always unplug unit before performing any repairs or maintenance.

Disconnect power: Unplug from electrical outlet before disassembly.
Allow to cool: Wait at least 1 hour after use before servicing.
Water safety: Empty water reservoir completely before repairs.
Electrical safety: Avoid contact with internal electrical components when wet.

WARNING! Risk of electrical shock and burns. Unit contains high voltage components and hot surfaces. Use extreme caution.

Disassembly Procedures

Follow these steps for safe disassembly of the Keurig B40.

Remove water reservoir: Lift straight up and away from unit.
Remove drip tray: Pull forward and lift out.
Remove outer casing: Remove 6 screws from bottom housing.
Access internal components: Carefully separate top and bottom housing.
Disconnect wiring: Note connections before disconnecting wires.
Remove brew chamber: Release locking tabs and lift out assembly.

CAUTION! Label all wires and take photos during disassembly for proper reassembly.

Specifications

Model: Keurig B40
Power: 120V AC, 60Hz, 1500W
Water Reservoir: 48 oz removable
Brew Sizes: 6oz, 8oz, 10oz programmable
Heating Time: ~3 minutes from cold start
Pump Pressure: 40-50 PSI
Dimensions: 10.5" W x 13.5" H x 11.5" D
Weight: 8.5 lbs
Warranty: 1 year limited

Tools Required

Essential tools for Keurig B40 repair and maintenance.

Tool	Purpose
Phillips Screwdriver #2	Case and component removal
Torx T10 Screwdriver	Internal component screws
Needle-nose Pliers	Wire disconnection and part handling
Multimeter	Electrical testing and diagnostics
Container	Catching water during disassembly
Cleaning Brush	Brew chamber cleaning
Descaling Solution	Mineral deposit removal

Common Issues & Solutions

Frequently encountered problems and their resolutions.

Unit won't power on: Check power cord, outlet, and internal fuse.
No water flow: Clean needles, check pump and water lines.
Leaking water: Inspect reservoir seal, internal tubing connections.
Error lights: Refer to diagnostic flash codes in manual.
Poor brew quality: Descale unit and clean brew chamber.
Slow brewing: Check for clogs in water path.

Maintenance Procedures

Regular maintenance to ensure optimal performance.

Daily cleaning: Wipe exterior, empty drip tray.
Weekly cleaning: Remove and rinse water reservoir.
Monthly descaling: Run descaling solution through system.
Brew chamber cleaning: Use needle cleaning tool monthly.
Filter replacement: Replace water filter every 2 months.

Tip: Use only Keurig descaling solution for best results.

Parts Replacement

Common replacement parts and installation procedures.

Part	Replacement Procedure
Water Pump	Disconnect hoses, remove mounting screws, install new pump
Heating Element	Drain system, disconnect wires, remove element housing
Brew Chamber	Release locking tabs, disconnect tubing, install new chamber
Control Board	Document wire positions, remove screws, install new board
Water Reservoir	Lift old reservoir, align new one, press into position
Drip Tray	Remove old tray, insert new tray until it clicks

Reassembly Guide

Follow reverse order of disassembly with these important notes.

Verify all components are clean and dry before reassembly.
Reconnect wiring in exact reverse order of disconnection.
Ensure all seals and gaskets are properly positioned.
Test unit without water before final assembly.
Perform water test with reservoir in place.

WARNING! Do not power on unit until fully reassembled and dry.

Regulatory Information

UL Listed: Complies with UL STD 197. FCC Part 15: Class B digital device. Copyright © Keurig Green Mountain, Inc. All rights reserved. Keurig® and K-Cup® are registered trademarks of Keurig Green Mountain, Inc. For technical support, visit www.keurig.com or contact 1-866-901-2739.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/outlet issue	Check outlet; test power cord; inspect internal fuse
No water flow	Clogged needles/pump failure	Clean brew needles; test pump operation; check water lines
Water leakage	Loose connections/worn seals	Tighten hose clamps; replace reservoir seal; inspect tubing
Error lights flashing	Sensor/component failure	Count flash pattern; refer to diagnostic chart; reset unit
Poor coffee temperature	Heating element/thermostat	Test heating element; check thermostat; descale system
Unit not brewing	Brew switch/control board	Test brew switch continuity; inspect control board connections

Reset Procedure: Unplug unit for 2 minutes, then restart.

Service Support: 1-866-901-2739; www.keurig.com