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Author Topic: Johnson A419 controller  (Read 98 times)

Cabo

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Johnson A419 controller
« on: February 04, 2019, 04:00:01 AM »

I'm running a 8 degree differential (195-187) but have noticed a lag on the fan kicking on.  Yesterday after cleaning, I turned the switch back on and the fan didn't come on.  I checked and it read 185  fan didn't kick on until 184.  Been running fine but wondering if the probe could go bad or the controller?  Should say it's 5 years old so it doesn't owe me anything.
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slimjim

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Re: Johnson A419 controller
« Reply #1 on: February 04, 2019, 04:01:37 AM »

Thatís odd, maybe just a quirk but keep an eye on it, if you need one I have several here.
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Wood boiler sales, service and installation for the Northeastern USA.

E Yoder

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Re: Johnson A419 controller
« Reply #2 on: February 04, 2019, 06:12:32 AM »

Could also check for loose connections on the wires or maybe the relay in the control is going bad.
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RSI

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Re: Johnson A419 controller
« Reply #3 on: February 04, 2019, 07:29:52 AM »

I would check the ASD setting and make sure it is set to 0.
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Cabo

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Re: Johnson A419 controller
« Reply #4 on: February 04, 2019, 04:51:52 PM »

Thanks for the replies.  I did check the ASD and it was at 1 so i did go back to 0 with it.  Thanks Richard, I'll grab one and get it on the shelf in case it becomes an issue.  Never had any problems with one and we run them on our sap pumps and I have 2 on my radiant zones. 
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