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Honeywell Q314A4586 Standing Pilot Burner Assembly & Q340A1090 36" Universal 30mV Copper Thermocouple Kit Engineering Diagram
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SPECFOUNDRY SKU: SF-HVC-109 · BRAND REF: Honeywell Home / Resideo

Honeywell Q314A4586 Standing Pilot Burner Assembly & Q340A1090 36" Universal 30mV Copper Thermocouple Kit

Stamped Casting / OEM Numbers: Q314A4586 Q340A1090 Q314A-4586 Q340A-1090 JA-DD-ISO BCR-18

Compatible Units: Honeywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air Furnaces

Critical Dimensions & Spec: B-type bracket; 1/4" compression inlet; BCR-18 Natural Gas & BBR-11 LP orifices included + 36" 30mV universal thermocouple

$54.99
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Pre-Order Dimensional Verification Checklist

OEM Cross-Reference & Stamped Casting Number Table

Use this cross-reference table to confirm that the number stamped or printed on your original hardware or circuit board corresponds to SpecFoundry SKU SF-HVC-109:

Stamped / OEM Part Number Manufacturer / System Brand Compatible Models & Years SpecFoundry Replacement SKU
Q314A4586Honeywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)
Q340A1090Honeywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)
Q314A-4586Honeywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)
Q340A-1090Honeywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)
JA-DD-ISOHoneywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)
BCR-18Honeywell Home / ResideoHoneywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air FurnacesDirect Match (SF-HVC-109)

Common Failure Symptoms Solved by SF-HVC-109

Technicians and property owners typically replace Q314A4586 when experiencing one or more of the following failure modes:

  • Standing pilot flame goes out as soon as gas valve knob is released
  • Yellow, lazy pilot flame failing to engulf thermocouple tip due to clogged primary air shutter
  • Open millivolt reading (<12mV) on oxidized copper thermocouple tip

Step-by-Step Dimensional Verification & Installation Notes

Position new Q340A1090 thermocouple tip so the pilot hood flame hits the top 3/8 inch of the sensor tip squarely. Hand-tighten thermocouple nut into gas valve plus 1/4 wrench turn only (over-tightening shorts the center conductor).

Related Technical Guide: Taco 571-2 vs. Honeywell V8043E Zone Valve Powerheads, B&G Couplers & Boiler Cross-Reference →

Frequently Asked Technical Questions (Q314A4586)

Where is the casting or OEM part number (Q314A4586 / Q340A1090 / Q314A-4586) stamped on this part?

On Honeywell Home / Resideo assemblies, look for the stamped or die-cast numbers (Q314A4586, Q340A1090, Q314A-4586, Q340A-1090, JA-DD-ISO, BCR-18) on the underside of the metal housing, along the link arm, on the stainless hinge track, or printed on the circuit board/valve label. Note that casting numbers identify the housing casting, so always confirm critical dimensions (B-type bracket; 1/4" compression inlet; BCR-18 Natural Gas & BBR-11 LP orifices included + 36" 30mV universal thermocouple) as well.

Does SpecFoundry SKU SF-HVC-109 directly replace OEM part Q314A4586 (Q314A4586, Q340A1090, Q314A-4586, Q340A-1090, JA-DD-ISO, BCR-18)?

Yes. SF-HVC-109 is verified to match the mounting footprint, electrical/mechanical ratings, and dimensional envelope of Honeywell Home / Resideo Q314A4586, Q340A1090, Q314A-4586, Q340A-1090, JA-DD-ISO, BCR-18 used on Honeywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air Furnaces.

What measurements should I verify before ordering SF-HVC-109?

Before ordering, verify: (1) Stamped or OEM code matches one of Q314A4586, Q340A1090, Q314A-4586, Q340A-1090, JA-DD-ISO, BCR-18; (2) Dimensional spec matches: B-type bracket; 1/4" compression inlet; BCR-18 Natural Gas & BBR-11 LP orifices included + 36" 30mV universal thermocouple; and (3) Application matches: Honeywell VR8200 / VR8300 Standing Pilot Gas Valves on Legacy Cast-Iron Boilers & Gravity/Forced-Air Furnaces.

How fast does SF-HVC-109 ship and what payment methods are accepted?

SF-HVC-109 ships within 1–2 business days from our US warehouse network. Flat-rate US Ground shipping is $8.95, or FREE on orders of $150+. You can check out online immediately via PayPal, Venmo, Credit/Debit Card, or request an Instant Card Payment Link / Net-30 Commercial PO Invoice.

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