Part Location Diagram of 73404 Mr Heater Pilot Assembly
See part 16 in the diagram
( Grid squares measure 1x1 inch )

Pilot Assembly 73404

Manufactured by:
Mr Heater
ERP Number:
ERP10424775
Part Number:
73404
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

30 - 60 mins 

(8 rated repairs) ?

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Product Description

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Includes Thermocouple.

Troubleshooting

This part works with the following brands:
  • Mr Heater
This part works with the following products:
  • Heater

Customer Part Reviews

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5.0
Average Rating (out of 5):
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(1 Review)
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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy 

30 - 60 mins 

(8 rated repairs) ?
  • 1
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Heater would not stay on when lit.

Dan from Chester, California

17 of 17 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Nutdriver, Screw drivers, Wrench (Adjustable)
Parts Used:
73404
I had to verify first by wire brushing the Pilot end sensor, Then trying to hold in the \" Pilot light button, then cleaning all the propane lines, and finally the Main propane regulator, carefully poking solid wire in and out of the outlet jet orifice. (sp). The final verifying process was doing a fuel / air wire trial test. In the b urner assembly. there is a air hole before the pilot flame Assembly that allows air to mix with the pilot flame. If you take different size pieces of wire and hold the in the hole which goes all the way through the other side it will restrict air mixing in with the pilot fuel and actually tune the pilot flame mixture. In my case the wire I used to get the pilot flame at It\'s proper color was the thickness of a small paper clip and at the same time increased the pilot flame longer to burn closer to the thermocouple sensor. I secured the wire in the hole and well , the test worked, Stayed on for 2hrs. and I was convinced. So I purchased a new complete pilot assembly and problem was solved and done Thanks for a good quality part. Dan
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Pilot light assembly inoperative

Richard from CAROLINE, Wisconsin

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
Removed outer metal covering on heater.
Disassembled gas lines to pilot light assembly, and electrical wire
Removed assembly, three screws GÇ£phillipsGÇ¥
Re-assembled in reverse order. Methodical.
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The pilot would not stay lit for more the 5 minutes

Stephen from Fort Wayne , Indiana

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
remove handle the side screws to allow the back and bottom to be removed.
Removed pilot assembly and tried to find thermo couple but found you have to buy whole assembly.
Got the part hooked up gas line and new tip saftey wire reasembled and it works great.
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Thermocoupler & Pilot assembly bad

WILLIAM from MARTIN, South Carolina

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
Disassembled heater and replaced old part with new parts.
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bad pilot

KEN from Brighton, Michigan

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Pliers, Screw drivers
Parts Used:
73404
removed old pilot and replaced with new one.
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Thermocouple was bad.

Phillip from White Lake, Michigan

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
Removed the necessary front and side panels to expose the parts to replace.
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heater would not stay lit

william from heber city, Utah

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
replaced the part by dismantling hilf of the heater. to date still not working
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Pilot light was clogged after unit was flooded

Wyatt from AUGUSTA, Maine

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers, Wrench set
Parts Used:
73404
Removed rear cover. Removed pilot light Assembly and replaced. Tested for leaks and restarted the heater.
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP10424775
Manufacturer Part Number: 73404
Brand Model Number Description
Mr Heater MH9B Heater - Heater