The GC102 original diagrams cover the ten-gallon pilot burner and tank, a short electric service section, and a separate 110-volt heating-component reference. Components in these distinct drawings must be identified by their callout, not by resemblance to the GC101 or GC102P versions.

Reading this diagram: Match the diagram callout and Atwood part number to the original component. Check the water-heater model and production revision, and confirm any superseded number before ordering.

GC102: Pilot gas and tank assembly

Atwood GC102 exploded water heater component and burner diagram
Illustration 1 of 3 — match each original drawing callout with its listed part number.
Ref. Manufacturer # Qty Original part description
1 90960 1 Flue Box Assembly
2 92640 1 Grille Only, New Style Door
3 91602 1 Robertshaw T-Stat, 3/8 Npt X 3/8 Npt
4 91601 1 White Rodgers T-Stat Use 91602
5 91044 1 Elbow 45 Degree 3/8 X 3/8
5 91347 1 Elbow 1/4 Npt X 3/8 Flair
6 93221 1 Main Burner
7 93914 1 Main Burner Orifice Use 93915
7 93915 1 Main Burner Orifice
8 91441 1 Elbow, 90 Degree 3/8 X 3/8
9 92616 1 Pilot Assembly Use 91603
9 91603 1 Jade Pilot Assy.
10 91858 1 Door Hardware Kit
11 93986 1 Door W/Grill - Pol. White 10 Gal
11 93993 1 Door W/Grill - Col. White 10 Gal
12 91928 1 Set Of 4 Corner Brackets
13 91561 1 Plug,Drain 1/2 Use 91857
13 91857 1 Drain Plug, 1/2 In. 2 Pack
14 92698 1 Petcock Drain Valve 1/8 In
15 93804 1 Electrode W/L Plate
16 93801 1 Ignition Module - Not Used On This Model
17 93803 1 Harness, Wiring - Not Used On This Model
18 96010 1 Ring & Gasket - Not Used On This Model
19 93935 1 Drawn Pan 10 Gallon Pilot
20 91604 1 Pressure Relief Valve, 1/2 Npt 150 Psi
21 91238 1 Tank Cover-Bottom-10 Gal Use 93610
21 91239 1 Tank Cover-Upper-10 Gal Use 93610
21 93610 1 Shroud Kit, 10 Gal
NS 91285 1 Jade Orifice Fits #91603 Pilot
NS 91596 1 Inner Tank
NS 92610 1 Rubber Grommet, Gas Line

GC102: Electric switch service list

Atwood GC102 electric components and service reference
Illustration 2 of 3 — match each original drawing callout with its listed part number.
Ref. Manufacturer # Qty Original part description
28 91116 1 On/Off Switch & Junction Box - Not Used On This Model
29 91160 1 Element Use 92249
29 92249 1 Element & Gasket Kit - 110v (Screw In) - NLA
30 91873 1 T-Stat & ECO 120 VAC

GC102: 110-volt heater and ECO components

Atwood GC102 heating element and temperature control parts diagram
Illustration 3 of 3 — match each original drawing callout with its listed part number.
Ref. Manufacturer # Qty Original part description
22 91182 1 Box, Junction W/On/Off Switch - Not Used On This Model
23 91097 1 Element,Heating 110v Use 91580
23 93089 1 Element,Heating Use 91580
23 91580 1 110 VAC Bolt-On Element - 1500w
24 91951 1 Switch/ECO Use 92942
24 92942 1 Switch, ECO Use 90037
24 90037 1 T-Stat Kit 110v
25 92943 1 Thermostat 140 Degree

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