If the relay is faulty, the entire board will need to be replaced.

You can accomplish that by purchasing a relay board from Harvest Right and watching this video, “Relay Board Replacement.”

Video Overview: How to Remove and Replace Panels and Relay Board on a Harvest Right Freeze Dryer

The video provides a guide on how to remove and replace panels, including the relay board, on a Harvest Right freeze dryer. The tutorial walks viewers through the step-by-step process, detailing tools needed and best practices.

Tools Needed:

• 1/8 inch Allen wrench
• 5/64 Allen wrench

Steps:

Step 1: Remove Power Cord – Unplug the machine's power cord completely to ensure safety.

Step 2: Panel Screws – Do not remove the two screws holding the panel in place at this point.

Step 3: Remove Top – Gently pull the top of the machine towards you to remove it.

Step 4: Remove Power Switch Panel – Use the 1/8 inch Allen wrench to remove the back panels.

Step 5: Right Side Panel – Use an Allen wrench with a rounded point to remove a screw and take off the right side panel.

Step 6: Final Fastener – Remove the last fastener on the upper corner using the Allen wrench.

Step 7: Unclip Panel – Gently pull out the two little clips that hold the panel.

Step 8: Remove Relay Board – Use a 5/64 Allen wrench to remove screws and disconnect grounding wires.

Step 9: Gray Ribbon Cable – Pull the gray ribbon cable upward to remove it.

Step 10: New Relay Board – Position the new relay board in place and secure it with screws.

Step 11: Transfer Wires – Move the wires one at a time, referring to labels or a reference photograph if necessary.

Step 12: Capacitor Wires – Remove and place the capacitor wires on open terminals; their specific placement is not critical.

Step 13: Attach Ribbon Cable – Make sure the notch on the ribbon cable aligns with the board before attaching.

Step 14: Ground Wires – Attach the ground wires, ensuring they are oriented downwards so they don’t interfere with the top panel.

Step 15: Testing – Before reinstalling the panels, plug the power back in and test the machine. If successful, LEDs should light up.

Step 16: Reinstall Side Panels – Align the base and tabs before tilting the panel up into place.

Step 17: Power Receptacles – Align the holes for the power receptacles.

Step 18: Final Screws – Start all screws for the back panel before tightening them down to ensure good alignment.