Rheem
Electric Water Heater

Model #81V40 Official Rheem 40-gallon power miser v electric water heater

Here are the diagrams and repair parts for Rheem 81V40 40-gallon power miser v electric water heater, as well as links to manuals and error code tables, if available.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

    Showing 10 of 17 parts

    Water Heater Drain Valve#15

    Functional replacement parts Diagram

    Drain valve

    Part #AP-10424-D
    Replaced by #9001588
    ?
    Manufacturer substitution
    This part replaces AP-10424-D. Substitute parts can look different from the original.
    In Stock
    $17.17
    Water Heater Dip Tube#2

    Functional replacement parts Diagram

    Dip tube

    Part #AS-21064-J
    Replaced by #SP11248R
    ?
    Manufacturer substitution
    This part replaces AS-21064-J. Substitute parts can look different from the original.
    In Stock
    $11.49
    Water Heater Heating Element Gasket#10

    Functional replacement parts Diagram

    Gasket

    Part #AP-6708
    Replaced by #SP6708
    ?
    Manufacturer substitution
    This part replaces AP-6708. Substitute parts can look different from the original.
    In Stock
    $8.99
    Box Cover#5

    Functional replacement parts Diagram

    Box cover

    Part #AS-29893
    Replaced by #AM29893
    ?
    Manufacturer substitution
    This part replaces AS-29893. Substitute parts can look different from the original.
    In Stock
    $18.26
    Element#11

    Functional replacement parts Diagram

    Element

    Part #AP-7485-ML

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

    Gasket#1

    Functional replacement parts Diagram

    Tube gasket

    Part #AP-6948
    Replaced by #AP6948-3
    ?
    Manufacturer substitution
    This part replaces AP-6948. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $2.16
    Plate#4

    Functional replacement parts Diagram

    Cover plate

    Part #AS-29892
    Replaced by #AM29892
    ?
    Manufacturer substitution
    This part replaces AS-29892. Substitute parts can look different from the original.
    In Stock
    $19.82
    Water Heater Thermostat#6

    Functional replacement parts Diagram

    Thermostat

    Part #AP-10161
    Replaced by #SP11698
    ?
    Manufacturer substitution
    This part replaces AP-10161. Substitute parts can look different from the original.
    In Stock
    $44.69 | 
    10% OFF 
    Phone Price: $49.69
    Shroud Valve#16

    Functional replacement parts Diagram

    Shroud valve

    Part #AP-2480

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

    JACKET ACCESS PANEL#9

    Functional replacement parts Diagram

    Jacket access panel

    Part #AS-25240(CB)

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

    Symptoms common to all water heaters

    Choose a symptom to see related water heater repairs.

    Main causes: lack of power, no gas supply, thermostat limit switch tripped, bad element, bad thermostat, gas valve failure, bad thermocouple
    Main causes: water supply needs chlorine treatment, anode rod too reactive
    Main causes: thermostats need adjustment, water heater capacity too low, bad heating element, thermostat failure, excessive tank sediment
    Main causes: thermostat temperature set too high, thermostats need adjustment, faulty thermostat, shorted heating element
    Main causes: faulty pressure relief valve, water is overheating
    Main causes: broken heating element, thermostat failure, excessive tank sediment, tank size too small, burner valve assembly failure
    Main causes: loose water pipe fittings, leaky drain valve, bad temperature-pressure relief valve, leaky heating element, cracked tank

    Repair guides for electric water heaters

    November 20, 2022
    By Lyle Weischwill
    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 following these step-by-step instructions.

    Repair difficulty
    Time required
     30 minutes or less
    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 heater's thermostat.

    Repair difficulty
    Time required
     30 minutes or less
    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.

    Repair difficulty
    Time required
     15 minutes or less

    Articles and videos common to all water heaters

    Use the advice and tips in these articles and videos to get the most out of your water heater.

    October 24, 2022

    Easy DIY appliance repairs that anyone can do

    By Lyle Weischwill

    Get advice on simple DIY fixes for appliances that you can safely do on your own.

    August 18, 2021

    Wiring schematic symbols explained video

    By Lyle Weischwill

    Learn some of the most common symbols found in a wiring diagram and what they mean.

    April 10, 2020

    Cleaning your appliances after a drinking water advisory

    By Julie Riebe

    Find out how to clean and flush household appliances once a boil water advisory is lifted.