0259M00005 – GOODMAN GAS VALVE WIRING HARNESS ADAPTOR (HONEYWELL TO WHITE-RODGERS)

Wiring harness adaptor that lets a White-Rodgers gas valve be wired into a Goodman/Amana furnace originally built with a Honeywell gas valve. It converts the existing plug and terminal arrangement so the factory harness can be reused instead of being cut and spliced. Use only where the replacement valve is otherwise a correct fit for the appliance.

This adapter also ships inside Goodman gas valve kit 0151M00027SK, the service replacement for the obsolete valve 0151M00028S, so it is used on additional two-stage furnace families that Goodman does not publish in one place. If you are replacing a two-stage gas valve and the plug does not match, this is the adapter. Published application data. Always match the full model and serial number on your unit before ordering.

Specs

• BrandGoodman
• Part Number0259M00005
• TypeGas valve adapter wiring harness
• Use WithGoodman 0151M00027S two-stage gas valve
• PurposeAdapts furnace harness from a Honeywell-style valve plug to a White-Rodgers-style valve plug
• Also Supplied InKit 0151M00027SK (valve + harness)

Cross-reference numbers

This part replaces the following OEM and aftermarket numbers:

• 0151M00027SK

Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.

Fits these models

• GCH950453BXAA
• GCH950453BXAB
• GCH950453BXAD
• GCH950703BXAA
• GCH950703BXAB
• GCH950703BXAD
• GCH950704CXAA
• GCH950704CXAB
• GCH950704CXAD
• GCH950904CXAA
• GCH950904CXAB
• GCH950904CXAC
• GCH950904CXAE
• GCH950905DXAA
• GCH950905DXAB
• GCH950905DXAD

How many conductors do I need?

Count terminals, then add spares. A gas furnace with cooling and a C wire needs five, for R, Y, G, W and C. A single-stage heat pump with auxiliary heat needs six or seven once you add O/B and E or W2. Two-stage or dual fuel wants eight. We stock 18/2 through 18/8, and the honest advice is to pull 18/8 on any new run. The wire is cheap and the wall is not going back open for free.

Solid or stranded?

Standard thermostat cable is 18 gauge solid copper, and that is what you want for a fixed run from the air handler to the wall. It lands cleanly in screw and push terminals and holds its shape in a cavity. Stranded belongs where things flex or vibrate, like a jumper in a cabinet or a lead to a damper motor. Skip copper-clad bargain cable. It reads fine on a meter and gives you a bad terminal a year later.

Can I use thermostat wire for the 240 volt side?

Never. Thermostat cable is Class 2 power-limited cable under NEC Article 725. It is not a branch circuit conductor and it is not rated for line voltage no matter what the jacket says. Line voltage from the disconnect to the unit goes in a listed whip or in conduit with properly sized conductors. Do not run the low voltage through that same whip either, because it is a code problem and it induces noise on your control signals.

Does run length matter?

Past about 100 feet it does, especially on 24 volt loads pulling real current. Long thin runs drop voltage and give you contactors that hum instead of pulling in. At 150 feet or more, go to 16 gauge or put a relay near the load. And protect the cable at every sheet metal pass with a grommet. That one detail is behind most blown board fuses we see.