Truma water heater repair #3

[Galway Girl]

We’ve been on some bumpy roads in Nova Scotia and it caused an issue with our truma water heater.

Symptom:

Louder  than normal water heater ignition.  A loud whoosh or pop on ignition.  Strong enough to blow out the flame. A smell of gas! 

Cause:

Burner tube assembly had come apart on the end of the tubes by slipping out of the retaining slots (last tube on either end) 

Fix on the road:

Removed the burner and regulator assembly and re-assembled by re-aligning and re-crimping the burner tubes into the frame.

Time: 40 minutes

Tools:

Crescent wrench & pliers for gas feed

2 Different size torx bits for burner screws

Steps:

 

Turn off gas & let burners cool down

Pull fuse for water heater

Take pix of wiring ( for re assembly)

Disassemble gas feed using backing wrench 

Disconnect various wires from plugs & headers ( Includes 2 screws to remove igniter) 

Remove 2 screws on front of burner/regulator assembly 

Slide out burner.

Reassemble burners in slots and crimp end burners

Reinstall in reverse order, checking for gas leaks before reinstalling fuse.

Run water heater to test.

Enjoy hot water !

 

The last right and left burner tubes had fallen out of the registration slots. That caused gas to flow from the two orfices directly into the burner chamber.  ( A nice big ignition event that blew out the other burners.)
 

I reassembled and crimped them back in place.

 

 

video describes which tabs need to be crimped.

 

 

 

 

 

 

Edited October 3 by Galway Girl
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[rich.dev]

@Galway Girl thanks for the very informative post, sounds like this is an issue with the Truma water heater, if I remember correctly you guys had a  similar issue before? Hope you guys enjoyed NS, we will be staying at a season spot just east of Truro when we return from Arizona next year April/May until October. 

[Galway Girl]

Yes, the  last issue was from Truma factory, improper torque on the regulated gas line into the burner.  
 

Nova Scotia was fantastic.

view from site 54 at The Islands PP. 

Edited October 3 by Galway Girl
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