Kaidi Recliner 2 Button Switch KDH038-301

How To Install the Kaidi KDH038-301 Switch

Follow the steps below to replace your electric recliner switch safely and correctly. Read the entire guide first. If you have any questions, contact our support team for help.

Before You Start (Safety First)

• Unplug the chair from mains power and wait 2–3 minutes for any stored charge to dissipate.
• Take a clear photo of the existing switch wiring and cable routing. This is your reference during reassembly.
• Safe lifting technique: if you need to tip or move the chair, bend your knees, keep the load close, and lift with your legs (not your back). Ask for help with heavy lounges.
• Work on a clean surface. Protect leather or fabric with a soft blanket or cardboard.
• Wear eye protection when drilling or using screws. Keep fingers clear of moving mechanisms.

Tools and Parts You Will Need

• Phillips screwdriver (or driver that suits your frame screws)
• 2 x wood screws for the rear plate (not supplied), length suited to your frame
• Drill and timber bit (only if you need to create the cut-out)
• Measuring tape and pencil for marking
• The new KDH038-301 switch assembly with faceplate, rear cover and star washers (included)

Check Fitment and Cut-Out

• The required cut-out in the arm or frame is 49mm (W) x 27mm (H).
• The rear plastic housing is 80mm x 36mm. Confirm clearance behind the panel.
• The faceplate is 100mm wide x 39mm deep at the centre and 3.4mm thick.
• The integrated lead is 1975mm long with a straight 5-pin male DIN plug that has retaining lugs.

Removal of the Old Switch

1. Unplug the transformer from the wall socket.
2. Locate the existing switch on the arm or seat side. Take a photo of the plug and routing.
3. Disconnect the switch cable from the chair harness or actuator control box. Some plugs have a latch. Press gently and pull straight.
4. Remove the old switch fixings from the arm panel and lift the switch out carefully. Do not force it through the opening.

Installing the Rear Plate

1. Hold the rear plate behind the cut-out. Ensure the plate sits flat against the frame and the opening is centred.
2. Using two suitable wood screws (not supplied), secure the rear plate to the frame. Do not overtighten. Check that the opening remains true.

Routing the Cable

1. Feed the new switch cable through the opening from the outside to the inside of the arm or frame.
2. Route the lead along the original path where possible. Avoid pinch points, sharp edges and moving linkages.
3. Guide the cable to the control box or actuator loom and leave the plug accessible for connection later.

Fitting the Switch and Faceplate

1. With the rear plate secured, align the switch body so the two mounting studs pass through the rear plate slots.
2. Seat the diamond faceplate in the opening so it sits flush. Ensure button orientation is correct for your left or right side installation.
3. From inside the arm, push the star washers onto the two 11mm studs until firm. The star washers lock onto the threads to hold the assembly in place for a seamless appearance.
4. Clip or place the rear plastic cover over the PCB and cable as supplied.

Connecting and Testing

1. Plug the 5-pin DIN connector into the chair control socket. Ensure the retaining lugs engage fully.
2. Re-check that the cable is clear of hinges and scissor mechanisms.
3. Reconnect the transformer to the wall socket and switch on.
4. Test both buttons. One should extend the actuator and the other should retract. If reversed for your preferred orientation, rotate the switch assembly 180 degrees and refit, or swap mounting sides if desired.

Final Checks

• Operate the chair through a full cycle while watching the cable path. Confirm there is no rubbing or pulling.
• Wipe the faceplate clean. Confirm the switch is seated evenly and does not rock.
• Dispose of the old part responsibly or keep it as a reference with your install photo.