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Parts for the Munchkin 399 VWH Boiler, Revision 2

  • Match the Item # on the chart with the same Item # indicated on one of the two line art diagrams below the chart.
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Expanded View (Diagram 1)

Item # Description Part #
1 Thermodisc Flue 210 Degrees 7250P-089
2 Steel Push Retainer (Thermodisc Flue ECO) 7250P-151
3 PVC Black Tubing 1/8 ID (Thermodisc Flue ECO) 7250P-311
4 Thermistor 7250P-667
5 Welded Module 7250P-623 (no longer available)
6 Gas Valve Piping Assembly 7250P-706*
7 ECO/High Limit Sensor 7250P-019
8 Screws M5 X 30MM Allen Head N/A
9 Right Angle Connector 7250P-723
10 Screws M4 x 12MM Allen Head N/A
11 Dungs Gas Valve 7250P-710
12 Screws M4 X 30MM Round Head (Gas Valve) 7250P-670
13 Swirl Plate - Black 7250P-712
14 Screw M5 x 12MM (Gas Valve Adapter Plate) 7500P-105
15 Gas Valve Adapter Plate 7250P-711
16 Relief Valve 7250P-576
17 Brass Nipple 3/4 in. NPT x 3 in. SN1018*
18 Brass 90 Degree Elbow 3/4 in. NPT 7250P-313*
19 Combustion Blower (Blower Motor) Old # 7250P-518, new # 7350P-159
20 Screw M5 x 12MM (Combustion Blower) 7250P-478
21 Gasket (Air/Gas Channel to Combustion Blower) 7500P-075
22 Air/Gas Channel 7250P-687
23 Gasket (Flame Rectification Probe/Spark Electrode) 7250P-005
24 Spark Electrode (with Gasket) 7350P-020
25 Screw M4 X 8MM (Flame Rectification Probe/Spark Electrode) 7250P-069
26 Flame Rectification Probe (with Gasket) 7250P-049
27 Screw Torx M5 X 22M (Air/Gas Channel to Burner Door) 7250P-206
28 Gasket (Air/Gas Channel to Burner) 7500P-074
29 NIT Burner 7250P-703
30 Nut M6 (Burner Door) 7500P-067
31 Burner Door 7250P-684
32 Burner Door Ceramic Refractory 7250P-702
33 Screw M4 X 8MM (Ceramic Target Wall) 7250P-704
34 Washer M4 (Ceramic Target Wall) 7500P-109
35 Ceramic Target Wall 7250P-160
36 24VAC Gas Valve Coil Only - Grey 7350P-623

Side View / Control Board (Diagram 2)

Item # Description Part #
41 Blocked Vent Pressure Switch 7250P-150
42 Screw #8 x 1/2 in. (Blocked Vent Pressure Switch) 7250P-133*
43 Relay Board 7250P-580
44 Control Board Mounting Panel (with Screws) 7250P-651*
45 Screw 1/4-20 X 1/2 in. (Control Board Mounting Panel) 7250P-184*
46 Control Board Hold Down Clips 7250P-352
47 926 Control Board (with Fuse)
- For units built after July, 2008, or if the board has been previously upgraded from 925 to 926
  926 Control Board Upgrade Kit
(Includes 926 Control Board (with Fuse) 7350P-008, Display Card and Ribbon Cable 7350P-009, Spark Cable 7250P-653, Hold Down Clips 7250P-352)
- For units with existing 925 Control Board (built prior to July, 2008), or to purchase all control board components in one kit
48 Fuse (Control Board) 7250P-378
49 Display Box for 925 Control Board 7250P-332
  Display Card for 926 Control 7350P-009
50 Electrical Box (with Screws, Covers) 7250P-707*
51 Screw #8 X 1/2 in. Self Tapping (Electrical Box) 7250P-133*
52 Cabinet Cover 7250P-501*
53 Flow Switch (with Paddle) 7250P-612
54 Flow Switch Paddle 7250P-613
55 Brass Tee 2 in. x 2 in. x 1 in. (Flow Switch) 7250P-588
56 Brass Nipple 1-1/2 in. X 2 in. X 3-3/4 in. 7250P-514
57 Cabinet Latch and Gasket Kit (with Screws) 7250P-671
58 Leveling Foot 7250P-673
59 Condensate Hose Assembly 7250P-724
60 PVC Nipple Sch. 80 3.4 in. NPT (Condensate Assembly) 7250P-648
61 Hose Clamp (Condensate Assembly) 7250P-210
62 PVC Tee Sch. 40 3/4 in. (Condensate Assembly) 7250P-646
63 Cable Clamp (Condensate Assembly) 7250P-649
64 Screw #8 X 1/2 in. Self Tapping (Condensate Assembly) 7250P-133*
65 Poly Plug 3/4 in. NPT (Condensate Assembly) 7250P-647
66 Band Clamp (Exhaust Assembly) 7250P-549
67 PVC Pipe Sch. 40 4 in. (Exhaust Assembly) 7250P-524*
68 S.S. Hex Nut 10-32 (Blocked Vent Pressure Switch) 7250P-153
69 O-Ring 007 (Blocked Vent Pressure Switch) 7250P-152
70 S.S. Hose Barb 1/4 X 10-32 (Blocked Vent Pressure Switch) 7250P-154
71 Plastic Tubing 3/16 in. ID (Blocked Vent Pressure Switch) 7000P-805
72 5 Pin Wiring Harness 7250P-721*
73 9 Pin Wiring Harness 7250P-602
74 Low Voltage Wiring Harness (10 Pin/20 Pin Main Wiring Harness, with Gas Valve Plug) 7250P-720*
75 Circulator Pump - 1-1/2 in. 7250P-592
76 Mounting Flanges - 1-1/2 in. 7250P-595

Expanded View (Diagram 1):

Munchkin 399VWH Parts Diagram


Side View / Control Board (Diagram 2):


Munchkin 399VWH Parts Diagram - Side View


Getting an error code on your display? Here are common Munchkin Error Codes and their Remedies.