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DownTheAvenue

Sunny South

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Posted: 06/29/20 08:07pm Link  |  Quote  |  Print  |  Notify Moderator

The problem is not air in the lines! The OP has states it has run multiple times for 3+ minutes before shutting off. Everything points to a bad control board.

enblethen

Moses Lake, WA

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Posted: 06/29/20 08:28pm Link  |  Quote  |  Print  |  Notify Moderator

Have not heard whether the water heater is sparking
Haven't heard whether OP can smell gas.
It could be several other things that can be problem.
Thermal fuse, no power from switch or to switch.


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2oldman

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Posted: 06/29/20 09:22pm Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:


Bad thermonuclear (Flame sensor) Rare but possible
.
That must be some water heater.

ken56

Tennessee

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Posted: 06/30/20 04:40am Link  |  Quote  |  Print  |  Notify Moderator

Had the same issue with mine a couple years back and it was the control board. Usually the warranty is 2 years and mine was within the warranty period so it was covered.

JimK-NY

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Posted: 06/30/20 05:19am Link  |  Quote  |  Print  |  Notify Moderator

You did not mention the model or manufacturer. It sounds like an Atwood which is prone to similar behavior.

Forget about air in the lines. Once the unit has run for a few seconds or minutes, any air is very likely to have been purged out.

The first step is to check the sensor/ignitor unit. You can pull it out and clean it and also check to be sure the gap is OK and the unit is properly positioned. Even better just replace the unit. As I remember they only cost about $15. There is a good chance that will fix the issue. If not, and for Atwood models, the next most common issue are the electrical wiring connections. Many people replace the control board with a 3rd party, Dinosaur unit. They think they fixed the problem when the only issue was poor electrical connections. The connection with the problem is the main ribbon connector to the control board. Just disconnect, clean the contacts, and reconnect. Mine still kept acting up so 10 years ago I put pressure on the connection with a 1 1/2" standard paper binder clip. That does not seem like it should be necessary, but it fixed my issue without the need to replace the control board.

wa8yxm

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Posted: 06/30/20 06:16am Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

Does any WH have a pilot light any more?

I go to youtube and see what they have to say.


Yes they still make pilot light models.


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wa8yxm

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Posted: 06/30/20 06:18am Link  |  Quote  |  Print  |  Notify Moderator

JimK-NY wrote:


Forget about air in the lines. Once the unit has run for a few seconds or minutes, any air is very likely to have been purged out.


WOW someone who actually understands propane systems !!!!

As I said up-thread I often laugh at the "Air in the lines" responses for after two or three attempts even the longest propane line in a 50 foot motor home will be purged.

kfp673

PA

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Posted: 06/30/20 07:04am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for all the suggestions. I will play with it over the next week or so and look into some of these suggestions. I am confident it is not an air in the line issue. I am very familiar with what that looks like and this seems to be something else. I have not had a chance to check the model/brand of the unit yet, but is there a general location of the control board? Is that something I can access from the outside? I dont recall seeing it in an obvious location. I will check all connections and use the air compressor to blow everything out first. If I still have issues I'll start looking to test and replace parts.

Generally speaking, will appliance manufacturers ever honor warranty when you do your own work? Not sure how long the warranty is, but if it turned out to be a control board, has anyone had the brand cover the cost without taking it to the dealer?

Thanks again all!

corvettekent

Marysville, WA

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Posted: 06/30/20 08:52am Link  |  Quote  |  Print  |  Notify Moderator

I would remove the burner tube and blow compressed air through the gas orfice.


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CavemanCharlie

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Posted: 06/30/20 01:16pm Link  |  Quote  |  Print  |  Notify Moderator

Maybe I read your post wrong. I often do that.

If you are running on electric and propane at the same time is it possible that it is simply shutting off because the water got hot enough and it didn't need to run anymore ???

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