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HOW TO REPLACE A THERMOCOUPLE ON A PARAGON KILN
Paragon PY70 Thermocouple. Paragon PY54 Thermocouple. Paragon PY81 Thermocouple. Paragon PY54 Back Plate.

How To Replace A Thermocouple On A Paragon Kiln.

The oldest thermocouple is a bead-style PY70 K-type, as in the first photo: it looks like two wires joined by a dot-weld. The wires pass through three ceramic sleeves and are long enough to reach the programmer board. The exposed bead can fail eventually because of everyday oxidation, corrosive gases, or prolonged high-temperature firing.

This was replaced by a stainless-steel sheathed-style PY54 K-type, as in the second photo, mounted on a ceramic back-plate held in place by two screws. The sheathed bead can fail eventually because of heat degradation, corrosive gases, or epoxy breakdown inside the sheath.

The new thermocouple is a heavy-guage welded PY84 K-type, as in the third photo, mounted on a ceramic back-plate held in place by two screws. It's a long-life design that responds more quickly to temperature changes and minimises the risk of corrosion and subsequent failure of the bi-metallic tip.
It's a universal design so it fits all the Paragon kilns. If the one you're replacing is shorter, carefully break off the last ceramic sleeve with some pliers. Partly straighten the wires, without breaking another sleeve, and fit the thermocouple. The wires will now be too long so nip off the excess so they don't touch the back of the kiln when it's all re-assembled. Don't do this before you fit it or you won't know which is the red connection.


To replace the newer styles, the ceramic back plate, inside the kiln, needs to be removed. It very rarely needs replacing, so a new thermocouple doesn't need a new back plate. When refitting the back plate, take great care not to over-tighten the retaining screws as the ceramic might crack.

The two wires, red and yellow, fit into two colour-coded push-down connectors on the programmer board. Make sure that the wires are gripped well, don't touch each other, and can't touch the metal case.

The K-type thermocouple, used in most of the Paragon kilns, has a nickel-chromium and nickel-aluminium bead. As an example, this pairing generates 12.2mV at 300°C. If accuracy, long-life, reliability, and stability are vital, especially at temperatures above 1100°C, you can upgrade to an S-type platinum-rhodium thermocouple. This has a porcelain tube.


Don't work on your kiln on any surface that might get scratched. Unplug the kiln. In the factory, screws are put in tightly with an electric screwdriver. When removing them, use the correct-size screwdriver. As with any screw, the wrong size screwdriver can damage the head, making it difficult to remove. And, when refitting them, don't over-tighten them in case the thread strips.

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UK To EU Plug Adapter.
Ceramic Block.
Ceramic Cloth.
EU Plug.
UK-EU Adapter.
Dry Powder Extinguisher.
Glare Resistant Glasses.
HEPA Mask.
heat-resistant Gloves.
Kitiki Cutters.
Kitiki Flush Cutters.
Kitiki Flat-Nose Pliers.
Kitiki Pointed-Nose Pliers.
Kitiki Bent-Nose Pliers.
Kitiki Round-Nose Pliers.
Protective Glasses.
Potter & Brumfield Relay.
Dorset, SW England.
UK 13A Plug.
The AX-4 Digital Controller.
MiniKiln Closed.
Prometheus Pro-7.
Large Rubber Drum 950gm Open
Bartlett-Paragon Touch Screen Digital Controller.
Paragon BlueBird Bead Annealing Kiln.
Lauscha by Carrie Fertig.
Activated Charcoal Granules.
Paragon Caldera Ceramics Kiln.
Paragon Caldera Bead Kiln.
Paragon Fusion CS14D Glass Kiln.
Paragon Fusion CS14SB Glass And Bead Kiln.
Paragon Caldera XL Ceramics Kiln.
Paragon F500 Lampwork Kiln.
Paragon FireFly Ceramics Kiln.
Paragon Fusion 7 Glass Kiln.
Paragon Fusion 8 Glass Kiln.
Paragon GL18ADTSD Glass Kiln.
Paragon HT-14D Heat Treating Furnace.
Paragon Janus 1613 Ceramics Kiln.
Paragon KM18D Knife Making Oven.
Paragon-Orton Vent Master: Unassembled.
Paragon-Orton Vent Master: Suction Cup.
Paragon Pearl 18 Glass Kiln.
Paragon PMT21 Heat Treating Kiln.
Paragon Door Peephole And Vent.
Stainless Steel Pans.
Paragon SC-2 Black Jewellery Kiln.
Paragon SC2 Jewellery Kiln.
Paragon SC2B Bead-Door Kiln.
Paragon SC2W Enamelling Kiln.
Paragon SC4 Glass Kiln.
Paragon SC2BW Jewellery And Bead Kiln.
Paragon SC2D Pro-3 Jewellery Kiln.
Paragon SC2 Shelf Kit.
Paragon SC-2 Jade Jewellery Kiln.
Paragon SC-2 Black Jewellery Kiln.
Orton-Paragon Sentry Xpress Programmer.
Orton-Paragon Sentry Programmer.
Bartlett-Paragon Sentinel Touch-Screen Controller.
Paragon SC-2 Pink Jewellery Kiln.
Paragon SC-2 Pro Black Jewellery Kiln.
Paragon SC-2 Turqoise Jewellery Kiln.
Paragon SC-2 Purple Jewellery Kiln.
Paragon SC-2 Navy Jewellery Kiln.
Paragon SC-2 Berry Jewellery Kiln.
Paragon ST-8 Kiln Table.
Paragon ST-8 Kiln Table With Casters.
Paragon TNF 1613 Ceramics Kiln.
Paragon GL24 Kiln Table.
Paragon Xpress 1613 Top Row Of Bricks.
Paragon W Lost-Wax Casting Kiln.
Paragon Lost-Wax Burnout Tray.
USB Plug.
Paragon Xpress E-12 Jewellery Kiln.
Paragon Xpress E-12B Bead Kiln.
Paragon Xpress E-14 Glass Kiln.
Paragon Xpress Q-11 Ceramics Kiln.