Difficulty
Moderate
Steps
25
Time Required
30 minutes - 1 hour
Sections
5
- Safety Precautions
- 1 step
- Upper Shell Removal
- 2 steps
- Right-Side Cover Removal
- 3 steps
- Motor and Pump Assembly Removal
- 15 steps
- Motor and Pump Assembly
- 4 steps
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0
BackMi-T-M Heater MH-0190-0M10 (2014)
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Introduction
This guide includes the motor, pump, and capacitor all as one assembly. If only the capacitor needs to be replaced, follow this guide.
After the new motor and pump assembly is installed, use a flat blade screwdriver to adjust the pump pressure back to 7.5 PSI as instructed on page 17 of the user manual.
What you need
Step 1
Safety precautions
- Power off the machine at least one hour prior to starting repairs. Ensure the machine is completely cool to the touch.
- Flip the power switch into the OFF position.
- Unplug any extension cords from the included power cord.
Power off the machine at least one hour prior to starting repairs. Ensure the machine is completely cool to the touch.
Flip the power switch into the OFF position.
Unplug any extension cords from the included power cord.
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Step 2
Remove the upper shell
- Use a 5/16 inch socket or Phillips screwdriver to remove the eight screws securing the upper shell, four on each side.
Use a 5/16 inch socket or Phillips screwdriver to remove the eight screws securing the upper shell, four on each side.
Step 3
- Lift the upper shell straight up off of the machine to remove it.
Lift the upper shell straight up off of the machine to remove it.
Step 4
Remove the right-side cover
- Use a 5/16 inch socket or Phillips screwdriver to remove the four bolts securing the right-side cover.
Use a 5/16 inch socket or Phillips screwdriver to remove the four bolts securing the right-side cover.
Step 5
- Tilt the right-side cover down to access the PCB board.
- Do not fully remove the right-side cover, it is still attached via the on/off switch.
- During reassembly, ensure the display window is aligned with the LCD display before you press the cover into place.
Tilt the right-side cover down to access the PCB board.
Do not fully remove the right-side cover, it is still attached via the on/off switch.
During reassembly, ensure the display window is aligned with the LCD display before you press the cover into place.
Step 6
- There are two wires connecting the power switch to the main PCB assembly.
- Use needle nose pliers to remove the wire with the blue connector.
- Remove the wire with the clear connector.
- Remove the right-side cover.
- During reassembly, install the power switch wires back in their original locations with the blue wire above the clear wire.
There are two wires connecting the power switch to the main PCB assembly.
Use needle nose pliers to remove the wire with the blue connector.
Remove the wire with the clear connector.
Remove the right-side cover.
During reassembly, install the power switch wires back in their original locations with the blue wire above the clear wire.
Step 7
Disconnect the ground wires
- Use a 5/16 inch socket or Phillips screwdriver to remove the screw securing the two green ground wires to the frame.
Use a 5/16 inch socket or Phillips screwdriver to remove the screw securing the two green ground wires to the frame.
Step 8
Disconnect the fuel line
- Use a pair of needle nose pliers to release the hose clamp from the fuel line.
- Slide the hose clamp off of the nipple, about one inch down the fuel line.
Use a pair of needle nose pliers to release the hose clamp from the fuel line.
Slide the hose clamp off of the nipple, about one inch down the fuel line.
Step 9
- Pull to disconnect the fuel line from the motor and pump assembly.
Pull to disconnect the fuel line from the motor and pump assembly.
Step 10
- Use a pair of needle nose pliers to remove the fuel line hose clamp.
Use a pair of needle nose pliers to remove the fuel line hose clamp.
Step 11
Disconnect the motor and pump assembly
- Use a pair of needle nose pliers to disconnect the wires connecting the motor and pump assembly to the main PCB board:
- One red cable labeled MOTOR 2 on the main PCB board
- One orange cable labeled MOTOR 1 on the main PCB board
- Pull the wires with the needle nose pliers by their connectors and not the wires themselves.
Use a pair of needle nose pliers to disconnect the wires connecting the motor and pump assembly to the main PCB board:
One red cable labeled MOTOR 2 on the main PCB board
One orange cable labeled MOTOR 1 on the main PCB board
Pull the wires with the needle nose pliers by their connectors and not the wires themselves.
Step 12
- Use a pair of flush cutters to cut the cable tie harnessing the wires running from the main PCB assembly.
- Remove the cable tie.
- During reassembly, install a new cable tie.
Use a pair of flush cutters to cut the cable tie harnessing the wires running from the main PCB assembly.
Remove the cable tie.
During reassembly, install a new cable tie.
Step 13
- Use a pair of flush cutters to cut the cable tie harnessing the orange, red, white, and black wires near the fuel line.
- During reassembly, install a new cable tie.
Use a pair of flush cutters to cut the cable tie harnessing the orange, red, white, and black wires near the fuel line.
Step 14
- Use a pair of flush cutters to cut the cable tie harnessing the orange and red wires next to the motor.
- During reassembly, install a new cable tie.
Use a pair of flush cutters to cut the cable tie harnessing the orange and red wires next to the motor.
Step 15
Detach the capacitor
- Use a Phillips screwdriver to remove the screw securing the capacitor band clamp.
Use a Phillips screwdriver to remove the screw securing the capacitor band clamp.
Step 16
- Remove the capacitor from the band clamp.
- During reassembly, realign the foam padding between the capacitor and the band clamp.
Remove the capacitor from the band clamp.
During reassembly, realign the foam padding between the capacitor and the band clamp.
Step 17
Remove the motor and pump assembly
- Feed the orange and red wires out through the opening in the lower shell.
Feed the orange and red wires out through the opening in the lower shell.
Step 18
- Use a 5/16 inch socket or Phillips screwdriver to remove the four bolts securing the left-side cover.
Use a 5/16 inch socket or Phillips screwdriver to remove the four bolts securing the left-side cover.
Step 19
- Remove the left-side cover.
Remove the left-side cover.
Step 20
- Use a 5/16 inch socket or Phillips screwdriver to remove the four screws securing the motor mount bracket, two on each side.
Use a 5/16 inch socket or Phillips screwdriver to remove the four screws securing the motor mount bracket, two on each side.
Step 21
- Lift the motor, pump, and bracket assembly straight up out of the machine.
Lift the motor, pump, and bracket assembly straight up out of the machine.
Step 22
Remove the fan
- Use a 3 mm hex key to loosen the set screw securing the fan to the motor shaft.
- The set screw does not need to be fully removed.
Use a 3 mm hex key to loosen the set screw securing the fan to the motor shaft.
The set screw does not need to be fully removed.
Step 23
- Remove the fan.
Remove the fan.
Step 24
Remove the motor mount bracket
- Use a 5/16 inch socket or Phillips screwdriver to remove the two screws securing the motor and pump assembly to the motor mount bracket.
Use a 5/16 inch socket or Phillips screwdriver to remove the two screws securing the motor and pump assembly to the motor mount bracket.
Step 25
- Remove the motor mount bracket.
- Only the motor and pump assembly remain.
Remove the motor mount bracket.
Only the motor and pump assembly remain.
To reassemble your device, follow these instructions in reverse order.
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