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Mr. Heater | Big Buddy Operating Instructions and Owner’s Manual
9 Inspect and clean pilot (mounted to bracket) by using a
vacuum or apply air pressure through the holes in the
pilot indicated by the arrows in Figure 3.
WARNING: Never use needles, wires, or similar cylin-
drical objects to clean the pilot to avoid damaging the
calibrated ruby that controls the gas flow.
10 Apply air pressure into ceramic tile of burner(s) assembly
and the venturi tube (with [2] air openings) to remove
dust, lint or spider webs.
11 Reinstall lower bafe with (3) screws
12 Slide back cover over (2) plastic hooks on top of heater.
Make sure rear cover aligns with plastic side covers.
Install (4) screws to hold in place.
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark electrode
– attach.
• Igniter wire damaged – replace.
• Piezo igniter on control valve defective – replace
control valve.
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – install disposable cylinder or
connect hose and turn on valve at remote cylinder.
• “PILOT” position not properly aligned – turn gas
control knob to “PILOT” position and depress.
• Pilot is blocked from spider web or dirt – clean
pilot, see MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
• Control knob in “PILOT” position not completely
depressed or held in long enough to purge air from
lines.
• Pilot ame not surrounding thermocouple – clean
pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect.
If Main burner(s) does not ignite.
CHECK
• Main burner(s) orice is blocked – clean burner(s),
see MAINTENANCE.
If Heater keeps shutting “OFF” during normal operation.
CHECK
• Pilot is blocked – clean pilot, see MAINTENANCE.
• Provide minimum fresh air opening of 18 square
inches (example 4 1/4” x 4 1/4” opening).
• Tip over switch activated from bumping heater. Re-
light
ACCESSORIES:
ITEM # DESCRIPTION
F273701 5 ft. PROPANE HOSE ASSEMBLY (Swivel 1”-20 Male Throwaway Cyl. Thd. X P.O.L. w/Handwheel)
F273702 12 ft. PROPANE HOSE ASSEMBLY (Swivel 1”-20 Male Throwaway Cyl. Thd. X P.O.L. w/Handwheel)
F272702 12 ft. PROPANE HOSE ASSEMBLY (Swivel 1”-20 Male Throwaway Cyl. Thd. X P.O.L. w/Handwheel)
F273699 Fuel Filter (Replace Annually)
F271802 12 ft. PROPANE HOSE ASSEMBLY w/quick disconnect ttings and 3/8” female are tting
F271803 12 ft. PROPANE HOSE ASSEMBLY w/quick disconnect ttings and 11” W.C. regulator w/Acme nut.
PARTS LIST:
SEE BACK PAGE FOR PARTS ORDERING INFORMATION
REF. # ITEM # DESCRIPTION
1 78402 HANDLE, ASSEMBLY, GRAY
78441 HANDLE, ASSEMBLY, BLACK
2 78403 FAN, SWITCH
3 78442 BACK, FAN, COVER
4 78404 BACK PANEL ASSEMBLY
(Includes parts 3, 5, 6, 7, and 8)
5 78406 FAN, BLOWER, WHEEL
6 78407 FAN, INTAKE, COVER
7 78408 DOOR, BATTERY, COVER, GRAY
78443 DOOR, BATTERY, COVER, BLACK
8 78409 BATTERY, TERMINALS
9 78410 DOOR LEFT SIDE COVER, GRAY
78444 DOOR LEFT SIDE COVER, BLACK
10 78411 LEFT, SIDE, COVER, GRAY
78445 LEFT, SIDE, COVER, BLACK
11 78412 (2) REGULATORS, MH18B
12 78413 TIE, WRAPS
13 78414 BRACKET, LEFT, SIDE, REG,
14 78415 LEFT, SIDE, GAS, SUPPLY, LINE
15 78416 FRAME, ASSEMBLY
16 78417 BRACKET, RIGHT, SIDE, REG,
17 78418 KNOB, CONTROL, RED
78512 KNOB, CONTROL, GREEN
18 78419 DOOR, RIGHT, SIDE, COVER, GRAY
78446 DOOR, RIGHT, SIDE, COVER, BLACK
19 78420 RIGHT, SIDE, COVER, GRAY
78447 RIGHT, SIDE, COVER, BLACK
20 78421 VALVE, CONTROL, ASSEMBLY
21 78422 PILOT, ASSEMBLY
22 78423 SHIELD, HEAT, BACK
23 78424 SHIELD, HEAT, FRONT
24 78425 COVER, FRONT, RED
78448 COVER, FRONT, YELLOW
78513 COVER, FRONT, GREEN
25 78426 GUARD, WIRE FACE
78449 GUARD, WIRE FACE, HD
26 78427 BRACKET, BOTTOM, PLENUM, ASSEMBLY
27 78428 PILOT, BRACKET
28 78429 REFLECTOR
29 73439 TILE
30 73433 TILE, GASKET (NOT SHOWN)
31 78431 PLENUM, BODY
32 78432 BRACKET, TOP, PLENUM, ASSEMBLY
33 78436 RUBBER FEET (4) NOT SHOWN