Directory: Catalog > Boilers & Water Heaters > Heat Transfer Products (HTP) > Parts

Parts for the Munchkin 399M 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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  • See the parts list sorted by part number.


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 Water Pressure Switch 7250P-096
6 Welded Module 7250P-623 (no longer available)
7 Gas Valve Piping Assembly 7250P-706*
8 ECO/High Limit Sensor 7250P-019
9 Screws M5 X 30MM Allen Head N/A
10 Right Angle Connector 7250P-723
11 Screws M5 x 12MM Allen Head N/A
12 Dungs Gas Valve 7250P-710
  Krom Schroder to Dungs Gas Valve Conversion Kit (not shown) 7250P-741
13 Screws M4 X 30MM Round Head (Gas Valve) 7250P-670
14 Swirl Plate - Black 7250P-712
15 Screw M5 x 12MM (Gas Valve Adapter Plate) 7500P-105
16 Gas Valve Adapter Plate 7250P-711
17 Relief Valve 7250P-080
18 Brass Nipple 3/4 in. NPT x 3 in. SN1018*
19 Brass 90 Degree Elbow 3/4 in. NPT 7250P-313*
20 Combustion Blower (Blower Motor) 7350P-159
21 Screw M5 x 12MM (Combustion Blower) 7250P-478
22 Gasket (Air/Gas Channel to Combustion Blower) 64980043 (old # 7500P-075)
23 Air/Gas Channel 7250P-687
24 Gasket (Flame Rectification Probe/Spark Electrode) 7250P-005
25 Spark Electrode (with Gasket) 7350P-020
26 Screw M4 X 8MM (Flame Rectification Probe/Spark Electrode) 7250P-069
27 Flame Rectification Probe (with Gasket) 7250P-049
28 Screw Torx M5 X 22M (Air/Gas Channel to Burner Door) 7250P-206
29 Gasket (Air/Gas Channel to Burner) 7500P-074
30 NIT Burner 7250P-703
31 Nut M6 (Burner Door) 7500P-067
32 Burner Door 7250P-684
33 Burner Door Ceramic Refractory 7250P-702
34 Screw M4 X 8MM (Ceramic Target Wall) 7250P-704
35 Washer M4 (Ceramic Target Wall) 7500P-109
36 Ceramic Target Wall 7250P-160
37 24VAC Gas Valve Coil Only - Grey 7350P-623 (discontinued, please order the complete gas valve assembly)
  Spark Cable (not shown) 7250P-653

Side View / Control Board (Diagram 2)

Item # Description Part #
41 Blocked Vent Pressure Switch 7250P-150 (new # 64980007)
42 Screw #8 x 1/2 in. (Blocked Vent Pressure Switch) 7250P-133
43 Control Board Mounting Panel (with Screws) 7250P-651*
44 Screw 1/4-20 X 1/2 in. (Control Board Mounting Panel) 7250P-184*
45 Control Board Hold Down Clips 7250P-352
46 926 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
  • For units built before July, 2008 that have the 925 Control Board
  • Includes 926 Control Board (with Fuse) 7350P-008, Display Card and Ribbon Cable 64980136 (old # 7350P-009), Spark Cable 7250P-653, Hold Down Clips 7250P-352, and Flue Jumper Wire (if needed).


47 Fuse (Control Board) 7250P-378

LED Display Box with Ribbon Cable - DISCONTINUED

  • Only if the main control board is 925.

LED Display Box with Ribbon Cable

  • Only if the main control board is 926.

Display Card and Ribbon Cable (without box)

  • Only if the main control board is 926.
7350P-009 (new # 64980136)
49 Electrical Box (with Screws, Covers) 7250P-707*
50 Screw #8 X 1/2 in. Self Tapping (Electrical Box) 7250P-133
51 Brass Nipple 1-1/2 in. X 2 in. X 3-3/4 in. 7250P-514
52 Cabinet Cover 7250P-501*
53 Cabinet Latch and Gasket Kit (with Screws) 7250P-671
54 Leveling Foot 7250P-673
55 Condensate Hose Assembly 7250P-724
56 PVC Nipple Sch. 80 3.4 in. NPT (Condensate Assembly) 7250P-648
57 Hose Clamp (Condensate Assembly) 7250P-210
58 PVC Tee Sch. 40 3/4 in. (Condensate Assembly) 7250P-646
59 Cable Clamp (Condensate Assembly) 7250P-649
60 Screw #8 X 1/2 in. Self Tapping (Condensate Assembly) 7250P-133*
61 Poly Plug 3/4 in. NPT (Condensate Assembly) 7250P-647
62 4 in. Z-Flex Adapter for PVC 7250P-733*
63 S.S. Hex Nut 10-32 (Blocked Vent Pressure Switch) 7250P-153
64 O-Ring 007 (Blocked Vent Pressure Switch) 7250P-152
65 S.S. Hose Barb 1/4 X 10-32 (Blocked Vent Pressure Switch) 7250P-154 (new # 64980137)
66 Plastic Tubing 3/16 in. ID (Blocked Vent Pressure Switch) 7000P-805
67 5 Pin Wiring Harness 7250P-696
68 9 Pin Wiring Harness 7250P-697
70 Low Voltage Wiring Harness (10 Pin/20 Pin Main Wiring Harness, with Gas Valve Plug) 7250P-699
  See Accessories - PC connection, vent kits, mesh screens, etc.  


Expanded View (Diagram 1):

Munchkin 399M R2 Parts Diagram


Side View / Control Board (Diagram 2):

Munchkin 399M R2 Parts Diagram - Front View


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