Cofi Silicone insulator (boot) 04PL041442

This is a straight silicone insulator (boot) for ignition and ionization electrodes, manufactured by Cofi in Italy. It has a length of 41 mm and accommodates wire diameters of 4.7–5.2 mm, with an electrode diameter range of 4.7–7 mm. The body is made of high-temperature silicone, resistant to temperatures up to +200°C and above. It is compatible with Cofi boots 11PC112013 and 11PC112010, and serves as an OEM equivalent for those parts. The insulator provides electrical insulation and protection for the high-voltage wire connection to the electrode.

When selecting an insulator of this type, verify the inner diameter matches the electrode rod or wire diameter, and the outer diameter fits the burner mounting bore. Measure the overall length and shape to ensure it matches the original part. Check for compatibility with the specific electrode assembly and burner model. Installation involves sliding the insulator onto the wire and ensuring a secure seal over the connection.

Insulators of this kind can fail due to cracking, glazing, or carbon tracking from high temperatures and combustion residues. A damaged insulator may cause spark leakage or loss of flame signal, leading to ignition failure or safety lockout. Inspect the insulator for visible damage and replace if any defects are found.