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Replacement Door for Harvia M3 Heater – Complete Guide 

Product ID: WX048

1. Confirm Your Harvia M3 Model

Harvia’s M3 series has slight variations. Check:

• Data plate (on the back/side of the stove) for:

  • M3 (standard)

  • M3 SL (slimline)

  • M3 B/W (black/white variants)

• Door dimensions: Typically 280mm × 250mm (measure to confirm)

3. Door Specifications

4. Installation Steps

1. Remove Old Door:

   • Lift straight up to disengage hinges.

   • Save hinge pins if reusable.

2. Prep New Door:

   • Apply stove polish to cast iron.

   • Install new gasket with high-temp silicone.

3. Hang New Door:

   • Align bottom hinge first, then top.

   • Test seal with paper test (should resist pulling when closed).

5. Alternative Solutions

• Custom Fabrication:

  • Local metal shops can replicate (~$300\text{–}$500).

  • Must use GG25 cast iron for heat resistance.

• Temporary Fixes:

  • Patch cracks with Rutland stove putty.

  • Replace gasket only if door is intact.

6. Price Estimates

7. Critical Notes

❗ Never use tempered glass—only ceramic (Schott Robax/Pyroceram).
❗ First firing: Heat gradually to 300°C (572°F) to cure gaskets.
❗ Hinge alignment must be precise—misalignment causes air leaks.

Need exact verification? Provide:

1. Serial number (backplate)

2. Photos of your current door/hinges

3. Measurements (if non-standard)

I’ll confirm the correct part number!