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Cozy
Furnace

Model # 86B35A Official Cozy floor furnace

Here are the diagrams and repair parts for Official Cozy 86B35A floor furnace, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 70 parts  |
Control 74303
#42

Furnace body diagram

Control

Part #74303

The manufacturer no longer makes this part, and there's no substitute part

Thermostat 86590
#22

Furnace body diagram

Thermostat

Part #86590

The manufacturer no longer makes this part, and there's no substitute part

Valve 74315
#26

Furnace body diagram

Valve

Part #74315

The manufacturer no longer makes this part, and there's no substitute part

Thermocouple 74305
#31

Furnace body diagram

Thermocouple

Part #74305

The manufacturer no longer makes this part, and there's no substitute part

Indicator 24045
#17

Furnace body diagram

Indicator

Part #24045

The manufacturer no longer makes this part, and there's no substitute part

Lighter Rod 74510
#11

Furnace body diagram

Lighter rod

Part #74510

The manufacturer no longer makes this part, and there's no substitute part

Screw 50106
#40

Furnace body diagram

Screw

Part #50106

The manufacturer no longer makes this part, and there's no substitute part

Conversion Kit 24443

#NI

All parts diagram

Conversion kit

Part #24443

The manufacturer no longer makes this part, and there's no substitute part

Orifice L 74607
#39BC

Furnace body diagram

Orifice l

Part #74607

The manufacturer no longer makes this part, and there's no substitute part

Conversion Kit 24074

#NI

All parts diagram

Conversion kit

Part #24074

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for electric water heaters

Why does my water heater's heating element fail often?

Main causes: excessive tank sediment, high voltage supply…

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Why does the temperature of my hot water fluctuate?

Main causes: thermostats need adjustment, bad heating elements, faulty thermostats, tank sediment build-up, broken dip t…

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Repair guides for electric water heaters

How to replace a water heater element

How to replace a water heater element

If your water heater runs out of hot water quickly and one of the two heating elements has failed, replace the element f…

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Repair difficulty
Time required
 30 minutes or less
How to replace an electric water heater thermostat

How to replace an electric water heater thermostat

If the water temperature fluctuates or you don't get enough hot water, follow these instructions to replace your water h…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a water heater temperature and pressure (T&P) relief valve

How to replace a water heater temperature and pressure (T&P) relief valve

Replace a broken temperature/pressure (T&P) relief valve on an electric water heater using these instructions.…

Read more
Repair difficulty
Time required
 15 minutes or less

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How to get your furnace ready for winter

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