Goodman B2589345 Gas Orifice #45 (M4)
A #45 (M4) gas orifice for Goodman HVAC systems, supplied new with manufacturer-direct shipping
- Precise #45 (M4) sizing ensures correct gas flow
- Genuine Goodman part guarantees exact furnace compatibility
- New condition delivers reliable performance from first ignition
- Manufacturer-direct supply chain reduces handling and transit time
- Listed April 29 2023 confirms current production specification
Goodman B2589345 Gas Orifice #45 M4
This Goodman B2589345 gas orifice is a replacement component for compatible HVAC systems. It is intended for technicians and RV owners servicing gas-fired heating equipment. The #45 (M4) designation identifies the specific bore size required for correct fuel metering.
Factory-new condition ensures reliable combustion
Supplied new, the orifice provides a clean, precise opening that supports proper burner ignition and stable flame characteristics. Correct orifice sizing helps maintain the designed heat output and fuel efficiency of the appliance during normal operation.
Direct-from-manufacturer supply simplifies sourcing
This item ships directly from the manufacturer, reducing handling steps and lead time for repair jobs. Orders of $75 or more qualify for free shipping, which can lower the overall cost when purchasing multiple parts or stocking spares. First listed by the manufacturer in April 2023.
How it compares
Measured against everything we stock in Fans, Vents & Climate Control, at today’s prices. Recalculated every night.
- Price $9.99
- Cheaper than about 94% of the 328 comparable items (median $68.99).
Specifications
| Product | |
|---|---|
| Brand name | GOODMAN |
Questions about this item
How do I install the #45 orifice in my Goodman furnace and what step is often missed?
Thread the M4 orifice into the burner manifold until snug, then verify the stamped #45 marking faces outward so the correct drill size is confirmed during inspection.
What maintenance or replacement will the #45 gas orifice need over time?
Inspect the orifice annually for carbon buildup or corrosion; replace it if the bore shows erosion or if the furnace fails to achieve proper combustion readings.
What limit appears first when the #45 orifice runs continuously during a heating season?
The fixed #45 bore size becomes the limiting factor; it cannot adjust gas flow if manifold pressure drifts, so combustion quality depends entirely on steady supply pressure.
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