Rheem Water Heater Manuals

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No matter if you lost your original Rheem water heater manual or the previous homeowners did not leave it behind, below you’ll find links to download user manuals in pdf format for the most popular and currently in-use Rheem residential water heaters. Make sure to visit our Rheem error codes page for help with troubleshooting tankless models.

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Rheem doesn’t have model number specific manuals but instead a single manual may cover a various sizes of a specific model. You can either left-click on the link to open the manual in a new tab or right-click and save a copy directly on your computer. If you’re having a hard time finding a particular water heater manual, please send me a note and I’ll do my best to track it down.

See Also:

Download Rheem Water Heater Manuals

Electric20-120 gallonLink
Electric20-52 gallon for manufactured housing (mobile home)Link
Gas30, 38, 40, 50, 55, and 60 gallonLink
Gas48, 63, 75, and 98 gallonLink
Gas78 and 98 gallon (newer)Link
Gas38 and 48 gallon condensing power direct ventLink
Gas40 and 50 gallon direct ventLink
Gas40 and 50 gallon co-axial direct ventLink
Gas40 and 50 gallon electronic direct ventLink
Gasdirect vent side inlet for manufactured housing (mobile home)Link
Gas29 gallon induced draftLink
Gas28, 38, 40, 48, and 55 gallon low NOxLink
Gas75 and 98 gallon low NOxLink
Gas38 and 48 gallon electronic low NOxLink
Gas40, 50, 65, and 75 gallon power direct ventLink
Gas40 and 50 gallon power ventLink
Gas75 gallon power ventLink
Gas40 and 50 gallon electronic power ventLink
Gas40 and 50 gallon electronic low NOx power ventLink
Gasside inlet for manufactured housing (mobile home)Link
Tanklesselectric tanklessLink
Tanklessgas tankless condensing direct ventLink
Tanklessgas tankless non-condensingLink

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  1. Looking for manual for Performance Platinum 50 Gal.water heater with LCD control panel. Particularly interested in the operation of the LCD control panel.

  2. Looking at a Rheem 6 gallon electric water heater, I need to drain it after using it in the winter. How do you drain it there is threaded hole in the bottom, but no one could tell me if that is the drain. Thanks for any help Gary Adamson

  3. Can someone tell me where I would find a manual/users guide for Rheem model PROG40S-36N RH67 PV. Not on this site.
    Thank you.

    • On almost all water heaters, the anode is located at the top of the water heater. Look for a hex shaped plug at the top of the water heater. You simply untighten the plug and remove it. You many need to spray some WD-40 on there to loosen it or even use an impact wrench. This page has general replacement instructions.

      On some water heaters, the anode rod is attached directly to the hot water nipple. On a few, the anode rod is located on the side of the tank.

    • Make sure your cold water inlet to the water heater is open all the way. It could also be a failed heat trap nipple on top of the water heater. Less likely, but there may be a blockage somewhere in the hot water pipes (close to the water heater). This is more common in older homes especially if a previous water heater failed.

  4. Home Depot does not check their returns just put them back on the shelf and then next Consumer gets the damage unit Home Depot won’t help

    • Yes, got one of those. Oddly in Mexico Rheem tankless and perhaps others have a three year warranty at Home Depot, not the more normal two year.

  5. Have an OLD Rheem Fury gas water heater. The model is 21V40-7 and the serial number is RN 0683A32696.

    Even searching on the Rheem website found no results. It said to contact their customer service.

    I am looking for a manual.

    • A102 on newer Rheem water heater indicates a Water Sensor Alarm. “Electronic control has detected water in the drain pan. Check the pan for water. If water is not present, disconnect the sensor, dry and reinstall it to reset the error.”

      If you see water in the drain pain, follow the process to diagnose a water heater leak.

  6. How do we test to see if our thermostat is bad or if the relief valve is bad? It gets super hot then the valve opens and dumps the water, what should we do?

    • Water heater manufacturers sure don’t make it easy since so many different models use the same manual. Yours is a 50-gallon atmospheric vent gas water heater.

      The third link “30, 38, 40, 50, 55, and 60 gallon” should cover it.

  7. PG&E had cut power. When I plugged the Rheem waterheater into the generator, it did not work. The frig and other things work with the cord, but not the Rheem. I push the button for three seconds and it does not do anything. Thoughts?

    • Keep in mind that most water heaters use 240 volts and their heating elements demand a lot of wattage. The generator may simply not be powerful enough for the demand.

  8. I have a 40 gal. Rheem water heater purchased in 2015 at Home Depot. Model xe40M12EC55u0 . The display is showing an “intermittent circulating series of dashed lines” while on or off. I’m unable to find any info on what’s wrong with it. It started happening when I try to operate it on generator power (rated at 7500W). Any ideas?

  9. I did not see a Use & Care Manual on the Rheem website for the water heater series that includes Model XG40T09HE40U0. Would you share a link please. Thank you.

  10. I have a Gladiator Platinum with an Econet controller. I want to disable the WiFi and moisture sensor. It has been constant problems. I keep getting an A102 fault. It will be a year old in Dec. There is no water or moisture around the base. I have gone as far as emptying the tank, tipping it back and using a hair dryer to dry the red strip on the bottom. Still the same fault pops up intermittently. It also constantly loses connectivity with home Wifi. I have a MESH system in my home and I was told by ECO that this device does not like when you have dual WiFi frequencies because it becomes confused. I am constantly having to re-initiate a WiFi connection from the HWH to my phone, and then from my phone to my network every time I want hot water. I clear the fault, hit the yellow bypass then everything works for a few hours and then the same problem arises again. I am getting really tired of this. I have called both Rheem Tech Support and ECO. No help. I am looking for a schematic so I can bypass the leak sensor valve shut off circuit and the ECO and just run this as a normal hot water heater using the thermostat on the front. The part number of the Eco is AP18536-01. Why don’t you just make the Eco dual frequency and stop this problem with it getting confused and going off line? This is really trying my patience. It has a port on the right side of the unit, I guess for trouble shooting. Why not just put a LAN port on the side so you have the option of hard wiring it directly to your router or for trouble shooting and stop this nonsense?

  11. Have a 2007 Rheem 40 gal. water heater: Model No 82V40-2. No hot water as of this morning. Is there a manual anywhere online. Tried normal stuff…breaker panel, reset button…Is there a fuse? Thank you and Merry Christmas to that repairman who is reading this on Christmas Eve 😉

    • Merry Christmas and sorry you’re water heater is not working. The first link on the page would cover your model. If you’re getting power, your upper heating element is likely at fault. Is any part of the water heater tank warm to the touch?

  12. I have a 50 gallon water heater, it has a flashing blue light. It flashes once every 7 seconds. Can you please tell me the problem it is indicating and how it can be fixed

  13. Hot water heater. 50 gallon electric. Has 3 vertical Blue lights. It is set for 125F. Top power light stays on. Middle Blue light comes on when needed. I have not seen the lower Blue light come on when extra hot water is needed.

  14. I have a model # SCG40T03ST34U1, serial # Q132059304. Water is hot enough, but VERY low pressure. Older building (constructed in 1890), previous water heater failed. End of March of this year.


  15. What is recommended maintenance of RHEEM water heater in area that has hard water?
    Can you use CLR or Vinegar? How do you flush unit?

  16. I have a 50 gallon gas Rheem Classic Plus Professional water heater which is cutting off unpredictably. I cannot find the user manual to help me find and fix the problem. Can you email me a pdf of the manual?


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