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Author Topic: What A419 Johnson control?  (Read 3125 times)

Joks79

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What A419 Johnson control?
« on: January 09, 2015, 05:27:04 PM »
I think I had a power surge today and I lost my A419 on my boiler today. Good thing I had a spare from my old ML30. Now I want to get a replacement from supplyhouse.com but don't know what one to get. Looking for some help.
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slimjim

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Re: What A419 Johnson control?
« Reply #1 on: January 10, 2015, 03:01:55 AM »
I have never done business with them but the A-419 is probably the most used control in the heating and cooling industry, it is very simple as you know and any model chosen should work as long as it breaks connection on temp rise.
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Wood boiler sales, service and installation for the Northeastern USA.

Joks79

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Re: What A419 Johnson control?
« Reply #2 on: January 10, 2015, 08:38:43 AM »
Thank you for the reply.
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american-pacemaker

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Re: What A419 Johnson control?
« Reply #3 on: January 10, 2015, 09:03:39 AM »
My optimizer 250 uses the  A419ABC-2 and supply house has amazing prices and service.
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CornFarmer416

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Re: What A419 Johnson control?
« Reply #4 on: January 12, 2015, 01:04:29 AM »
How many years did you get out of your ML 30?
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Stihl 461
Homemade Skid Steer Log Splitter turned upside down
Ohio
If it aint Red, keep it in the Shed

Joks79

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Re: What A419 Johnson control?
« Reply #5 on: January 12, 2015, 05:01:14 AM »
just short of 5    :(
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ijon

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Re: What A419 Johnson control?
« Reply #6 on: January 13, 2015, 03:21:49 AM »
What went wrong with it?
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installed in 2014

Joks79

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Re: What A419 Johnson control?
« Reply #7 on: January 13, 2015, 05:22:35 AM »
The upper heat exchanger rotted out from the inside out right at the weld inside the door. This was the front door.
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CornFarmer416

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Re: What A419 Johnson control?
« Reply #8 on: January 14, 2015, 06:14:12 PM »
Was that a bad unit? Or something you did wrong? there is no point in buy a boiler if we have to replace it every 5 years.
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Stihl 461
Homemade Skid Steer Log Splitter turned upside down
Ohio
If it aint Red, keep it in the Shed

Joks79

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Re: What A419 Johnson control?
« Reply #9 on: January 15, 2015, 02:36:54 PM »
It was a mixture of things. Some my fault, some from a BAD dealer, and some design. I didn't have any help from my dealer and he is no longer a dealer.

My water was too cool with a 5º diff. I was looping my return water into my work room in my garage and then back to the stove. I was burning year round.


The Ml's clean-out door wasn't insulated (Bl now has the storm door). So the warm exhaust would hit the cold steel and condensation.

That's the short story.

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