Modern Day Central Vacuum Parts - Filters, Motors & Parts

Filtration for Modern Day Central Vacuum

Closed Bags

Closed Bags

Some units utilize the single entry closed filtration bags pictured here. Buy closed bags.

Open Top Bags

Open Top Bags

Most units produced prior to the release of Tru-Seal used our genuine Hyperflow bags.

Tru-Seal Bags

Tru-Seal Bags

Convert your dusty, open top filtration to a completely encapsulating, hypoallergenic filtration system. It even connects to the utility port! Buy the Tru-Seal Upgrade Kit now. Also available are the Replacement Tru-Seal Bags.

Filters, Motors & Parts for Modern Day Vacuum Power Units

Search Model Number:
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(Results include all instances, not just model number.)
Model # Motor 1 Motor 2 Filter Circuit Board
Modern Day A
110-120 volts
A
Motor 203 Details & Instructions
(Quantity 1)
203
Replaces 116507, 116119, and 117478
None
Filter: 720HF-5
720HF-5

Click link to see filter options.
Board 235S
235S
Modern Day A
220-240 volts
A
Motor 203X Details & Instructions
(Quantity 1)
203X
Replaces 116743
None
Filter: 720HF-5
720HF-5

Board 236S
236S
Modern Day B
110-120 volts
B
Motor 201 Details & Instructions
(Quantity 1)
201
None
Filter: 720HF-5
720HF-5

Board 235S
235S
Modern Day B
220-240 volts
B
Motor 207X Details & Instructions
(Quantity 1)
207X
None
Filter: 720HF-5
720HF-5

Board 236S
236S
Modern Day B2
110-120 volts
B2
Motor 202G Details & Instructions
(Quantity 2)
202G
Motor Alternate: 205 Details & Instructions
Alternate: 205
10% Stronger and Noisier
Filter: 720HF-5
720HF-5

Board 235M
235M
Modern Day B2
220-240 volts
B2
Motor 205F Details & Instructions
(Quantity 2)
205F
None
Filter: 720HF-5
720HF-5

Board 236M
236M
Modern Day E
110-120 volts
E
Motor 201 Details & Instructions
(Quantity 1)
201
Replaces 116465, can also use 117465
None
Filter: 720HF-5
720HF-5

Board 235S
235S
Modern Day E
220-240 volts
E
Motor 200X Details & Instructions
(Quantity 1)
200X
Replaces 116717, can also use 117157
None
Filter: 720HF-5
720HF-5

Board 236S
236S
Modern Day E2
110-120 volts
E2
Motor 202G Details & Instructions
(Quantity 2)
202G
Motor Alternate: 205 Details & Instructions
Alternate: 205
10% Stronger and Noisier
Filter: 720HF-5
720HF-5

Board 235M
235M
Modern Day E2
220-240 volts
E2
Motor 205F Details & Instructions
(Quantity 2)
205F
None
Filter: 720HF-5
720HF-5

Board 236M
236M
Modern Day E3
110-120 volts
E3
Motor 202G Details & Instructions
(Quantity 3)
202G
Remove screen on unit for taller motor.
Motor Alternate: 205 Details & Instructions
Alternate: 205
10% Stronger and Noisier
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day E3
220-240 volts
E3
Motor 205F Details & Instructions
(Quantity 3)
205F
Remove screen on unit for taller motor.
None
Filter: 720HF-5
720HF-5

Board 236L
236L
Modern Day G23
110-120 volts
G23
Motor 199 Details & Instructions
(Quantity 2)
199
None
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day G23
220-240 volts
G23
Motor 199X Details & Instructions
(Quantity 2)
199X
None
Filter: 720HF-5
720HF-5

Board 236L
236L
Modern Day J
110-120 volts
J
Motor 199 Details & Instructions
(Quantity 1)
199
None
Filter: 720HF-5
720HF-5

Board 235S
235S
Modern Day J
220-240 volts
J
Motor 199X Details & Instructions
(Quantity 1)
199X
None
Filter: 720HF-5
720HF-5

Board 236S
236S
Modern Day M465h
110-120 volts
M465h
Motor 199 Details & Instructions
199
None
Filter: 720TS-3
720TS-3

Board 235S
235S
Modern Day M575h
110-120 volts
M575h
Motor 199B2 Details & Instructions
199B2
None
Filter: 720TS-3
720TS-3

Board 235S18
235S18
Modern Day M575h2
220-240 volts
M575h2
Motor 199BX Details & Instructions
199BX
None
Filter: 720TS-3
720TS-3

Board 236M
236M
Modern Day M615h
110-120 volts
M615h
Motor 199C Details & Instructions
199C
None
Filter: 720TS-3
720TS-3

Board 235S18
235S18
Modern Day M615h2
220-240 volts
M615h2
Motor 199CX Details & Instructions
199CX
Call for details
None
Filter: 720HF-5
720HF-5

Board 236M
236M
Modern Day M715h
110-120 volts
M715h
Motor 204A Details & Instructions
204A
Call for details
None
Filter: 720HF-5
720HF-5

Board 235S18
235S18
Modern Day M715h2
220-240 volts
M715h2
Motor 204AX Details & Instructions
204AX
Call for details
None
Filter: 720HF-5
720HF-5

Board 236M
236M
Modern Day M965h
110-120 volts
M965h
Call for details
None
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day M965h2
220-240 volts
M965h2
Call for details
None
Filter: 720HF-5
720HF-5

Board 236L
236L
Modern Day QE2
110-120 volts
QE2
Motor 205 Details & Instructions
(Quantity 2)
205
Motor Alternate: 202G Details & Instructions
Alternate: 202G
Replaces 116757 and 116336
Filter: 720HF-5
720HF-5

Board 235M
235M
Modern Day QE2
220-240 volts
QE2
Motor 205F Details & Instructions
(Quantity 2)
205F
None
Filter: 720HF-5
720HF-5

Board 236M
236M
Modern Day QE3
110-120 volts
QE3
Motor 205 Details & Instructions
(Quantity 3)
205
Motor Alternate: 202G Details & Instructions
Alternate: 202G
Replaces 116757 and 116336
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day QE3
220-240 volts
QE3
Motor 205F Details & Instructions
(Quantity 3)
205F
None
Filter: 720HF-5
720HF-5

Board 236L
236L
Modern Day SR
110-120 volts
SR
Motor 200SR Details & Instructions
(Quantity 1)
200SR
None
Filter: 720HF-5
720HF-5

Board 235S18
235S18
Modern Day SV
110-120 volts
SV
Motor 207 Details & Instructions
(Quantity 2)
207
Bolt flange(s) removed with hacksaw
Motor Alternate: 201 Details & Instructions
Alternate: 201
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day SV
220-240 volts
SV
Motor 207X Details & Instructions
(Quantity 2)
207X
Bolt flange(s) removed with hacksaw
Motor Alternate: 200X Details & Instructions
Alternate: 200X
Filter: 720HF-5
720HF-5

Board 236L
236L
Modern Day SVT
110-120 volts
SVT
Motor 203 Details & Instructions
(Quantity 2)
203
Bolt flange(s) removed with hacksaw
Motor Alternate: 204 Details & Instructions
Alternate: 204
Filter: 720HF-5
720HF-5

Board 235L
235L
Modern Day SVT
220-240 volts
SVT
Motor 203X Details & Instructions
(Quantity 2)
203X
Bolt flange(s) removed with hacksaw
Motor Alternate: 203PX Details & Instructions
Alternate: 203PX
Filter: 720HF-5
720HF-5

Board 236L
236L

Maintenance Tips for Modern Day

Motor Replacement Tips

  • Dying motors just stop, but can randomly work.
  • Motor is usually dead if you only hear a click or smell electrical.
  • Motor replacement instructions here. Skill level medium.
  • Find a replacement motor using the model search below.

Only hear a "click" at the motor when trying to start the Modern Day system? Or, does it shut off and start back up in a few minutes? These are common signs of a dead motor, which leaves two options: replace the motor or replace the unit. If you liked the amount of suction the Modern Day model had, then replace the motor using the information above. If you'd like stronger suction, or a cleaner disposal system, then consider a different unit or alternative brand from MD Vacuum. Our units are Assembled in the USA with the finest materials and backed with excellent customer service.

Filtration Maintenance

Much like a regular portable vacuum, the basic maintenance of a Modern Day Central Vacuum System is changing the bag, or, in most cases, emptying the dirt receptacle on the main unit. To do this, remove the base of the unit with a twist or by unlatching, then dump the debris and put a plastic bag over the bottom and shake the center-weighted cloth filter. On top emptying models simply open the top and remove the bag. On bottom models without a cloth filter, reach up and remove the mesh filter or clean the debris screen. Some models may have a foam filter that can be removed and washed and completely air dried.

Modern Day Main Motor Maintenance

How a Vacuum Motor Works

All Modern Day units used permanently sealed motors in their main collection unit. They require no lubrication or oiling. Routine maintenance for typical residential usage should include checking the motor brushes approximately every five years. While checking the motor brushes, make sure the center motor shaft is solid and has no play or wobble. If it does, the bearings are going out and the motor will need to be replaced. If the motor brushes are worn to 3/16 inch long, replace the motor brushes.

If the unit does not have any paper or cloth bag filtration, then a certain volume of debris may accumulate on the motor's internal fan blades. This is not easy to remove and any attempt to remove it has the high possibility of offsetting the balance of the fans. An imbalanced fan causes premature motor failure on the motor bearings.

Here are instructions for checking and replacing vacuum motor brushes. Motor brushes conduct electricity into the motor while touching the center shaft. Over time, they wear down. If they wear all the way down, they can damage the motor.

Click on the image above to understand how a vacuum motor works.

Modern Day Pipe System Maintenance

Modern Day Vacuum Pipe Maintenance Sheets

The pipes in your system should last for the lifetime of your home if properly installed. If black carbon dust has gathered on the exterior of the pipes through static electricity, it can removed with a damp, soapy cloth.

We recommend cleaning out the interior of the piping system at least once per year. The most effective method is with Free Flow Central Vacuum Maintenance Sheets. They do a couple of things. As the sheets are pulled through the pipes, they push along all kinds of items that sit in dead spots, as well as deodorize the hose, pipes, and unit. Some amazing things can be pushed out from your Modern Day Central Vacuum pipes, resulting in better suction. We have seen Match Box Cars, C02 cartridges, pencils, rocks, paper clips, and huge clumps of nasty debris.

Modern Day Vacuum Hose Maintenance

Your vacuum hose will last longer if it is stored on a hose hanger, always being detached from the vacuum after each use. Simply create four or five loops and hang it up. Consider a Hose Cover to protect the hose and your baseboards. See if any of these Storage Items can help your situation. Consider hose hangers, wand hangers, hose straps and more. You can get everything off the floor for a more organized closet.

Reminder Emails Sent to Empty Your Modern Day Vacuum

Modern Day Filtration Empty Reminder

Sign up for Free Quarterly Email Reminders to remind you to dispose of your central vacuum debris. Operating your unit with a full filter can reduce suction, making the unit run hotter and clean less efficiently. Your email will not be used for any other purpose, or be sold or borrowed. We simply want to help you remember to keep your Modern Day Central Vacuum working at its top performance.

(The image above does not reflect all types of central vacuum filtration.)

Click Here to Start Your Reminders.

Troubleshooting Your Modern Day Central Vacuum

Modern Day Vacuum Troubleshooting and Repair

Self diagnose your system using this Interactive Troubleshooting and Repair Solutions Guide for Modern Day Central Vac. We guide you through a simple, methodical deduction of tests and symptoms to find the problematic source of anything from:

We then offer a description of the problem and solutions to repair your Modern Day Central Vacuum. We also have 100s of local, independent dealers you can reach out to for help.

Visit the Troubleshooting and Repair Solutions Guide for Modern Day Central Vacuum

Modern Day Central Vacuum Motor Replacement

Modern Day Vacuum Motor Replacement Help

You have a couple of options when it comes time to replace the motor on your Modern Day Central Vacuum. Contact a local dealer for service, or consider doing it yourself. Motors on the Modern Day vacuum have a few fasteners and wires that need to be unattached, then reattached on the new motor. It should take less than one hour to change your motor(s). Here is a quick "how-to" change your motor:

  1. Use the Modern Day Motor Replacement Parts Chart to find the right replacement motor for your Modern Day model. When your new motor arrives, take some photos of your original motor so you remember how it was wired and secured.
  2. Turn off the circuit breaker or unplug the central vacuum unit.
  3. Access the motor by releasing the outer housing (usually a few screws around the perimeter). Remove the motor and unclip the motor wires from the components.

    Note: Your new motor may not have the correct wire ends. If that is the case, we recommend cutting the wires from the old motor and wire nutting the new motor wire to the old motor wire. Using the original wire with the correct end to attach to the components makes your job a lot simpler and the connections safe and secure.

Note that a motor may have many numbers on it, but typically the complete motor number starts with "11" followed by 4 more numbers and maybe a dash with two more numbers (e.g. 115334-00). Years ago, they didn't put the complete part number on the motor.

For more information, see our detailed Modern Day Motor Replacement Instructions.

Circuit Board, Relay, Transformer, MiniBreaker

Modern Day Circuit Board Replacement

In 2004 all MD Central Vacuums transitioned to an all-in-one control board. If your Modern Day Central Vacuum needs a new relay, transformer, mini breaker, or even a new control board or circuit board, use one of these powerful, durable, cost-saving central vacuum circuit boards. You save money, time, and headaches. The reality is, a central vacuum really only requires a motor and one circuit board. It is not terribly difficult to retrofit a circuit board. An electrician can do it in under an hour.

To find the circuit board you need, verify the number of motors in your unit and the amperage requirements. The most common board replacement for Modern Day Vacuums is the Vacuum Motor Circuit Board for Single Motor Units 110 Volt. For other voltages and motor configurations choose one of these Durable Generic Circuit Boards made by the industry leading manufacturer. Or, use your model number and the Motor Replacement Parts Chart for Modern Day to see our recommended circuit board. There are other Generic Circuit Boards for units with different voltage and multiple motors. Print and use the large photograph of the board as the wiring guide.

Older wiring diagrams for pre-board units:

Motor Brush Help for Modern Day Central Vacuum

Modern Day Motor Brush Help

The Modern Day motor has two carbon brushes in each motor that wear down but can be replaced before they damage the motor. Modern Day motor brushes should be checked every five years in typical residential applications and should be replaced if the 3/4 inch-long solid carbon "brush" is worn down to anywhere near 3/16 inch. Here are instructions for Checking and replacing vacuum motor brushes. Motor brushes conduct electricity into the motor while touching the center shaft. To find the replacement motor brush for your Modern Day Central Vacuum, type the motor replacement number (not brand model number) in the search box and the motor brush will come up in the search result; instructions are on the motor brush page.

Know that the Modern Day motor may go bad for other reasons, such as bad bearings or dust build-up in the motor (both are not repairable). If your motor brush doesn't show up under your original motor model number, replace the motor, not the motor brush.