How To fix Rinnai water heater Error Code 25?

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Rinnai water heater Error Code 25

Full swing into winter and facing problems with your water heating system, not an ideal situation to be stuck in.

If you are using a Rinnai water heater, you know that several parts of the heater work in unison to ensure you get the best service. There are certain parts that are also prone to display issues if you do not take care of the maintenance at the right time.

Fortunately, in the case of the Rinnai heaters, you will get an error code displayed which will tell you what is wrong.

If you are getting the error code 25 for instance, it means that you need to take a look at the condensate pipe. There could be other issues as well but this is the most probable case.

In this article, let’s discuss the Rinnai error code 25 in detail with all the fixes that you can use to fix the heater before calling in a technician.


How to solve the error code 25 on the Rinnai water heater?


When you are receiving a constant supply of hot water from the heater, it is normal that you do not think about the machinery that goes behind it to make sure that everything is working perfectly.

The condensate pipe is very important to make sure that the cooling vapors are returned to the heater system. Anyway, we are here to discuss the issues with the condensate pipe, and let’s make it quick so that you can get your water supply back.

Here are the solutions that you can use to fix the issue on the Rinnai heater.

Fix 1: Open the machinery and check the condensate pipe for any blockages

Before you open the Rinnai heater, make sure that you disconnect the heater from all the power outlets. 

Remove all the wires that are connected to the heater. 

Fish out the user manual of your water heater and find out where you can look for the condensate line.

Check the pipes for any blockages or debris. Remove the blockages and clean the pipe. This will help with the flow of water.


Fix 2: Check the location of the condensate pipe

Have you installed the condensate pipe in an outside location where snow could cause the pipe to contract?

Check the location of the pipe and look around the condensate pipe for frost or frozen icicles. If you find ice around the condensate pipe, remove it and place the pipe in a place where this will not be the cause of pipe contraction anymore.


Fix 3: Check the condensate trap for the heating system

The condensate trap will catch any debris that is stuck into the condensate pipe. If you regularly find a lot of material in the condensate trap, this means that the water heater needs more cleaning on your part.

Clean the condensate line and the trap and then turn on the heater to see if the issue is resolved.


Fix 4: Contact the Rinnai support team

If the above fixes have not helped you get rid of the error code 25 on the heater, or, if you opened up the heater to see that the condensate line is clean, you should contact the Rinnai support team.

If the heater is under warranty, you can also avail free repairs or a replacement for the entire unit if the heater is beyond repair.

If you do not understand the technical details of the heater, you should definitely call in a technician and not attempt to take care of the issue yourself.


To conclude


The issue with the error code 25 on the heater is with the condensate line. If the condensate line is not clear, this will cause the machinery of the heater to malfunction.

We have suggested a couple of fixes that can help you in the situation. Hopefully, these fixes can help you with the error code. 

Keep following for more technical advice.


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