Hi, all-
I'm in hot water over cold water.
I have a solar DHW drainback system that has worked great for almost 20 years.
But the Radco Products Transfer Module that controls everything has stopped working.
In Test mode the pumps turn on, but in Auto mode the pumps do not turn on.
I've tested both thermistors with an Ohm meter & they both tested within acceptable ranges.
So now I'm at a bit of a loss.
Is there anything else I can or should test?
Or is this thing most likely toast?
And what the heck do I order to replace it? Radco is out of business.
Sign me- NOT In Hot Water
I'm in hot water over cold water.
I have a solar DHW drainback system that has worked great for almost 20 years.
But the Radco Products Transfer Module that controls everything has stopped working.
In Test mode the pumps turn on, but in Auto mode the pumps do not turn on.
I've tested both thermistors with an Ohm meter & they both tested within acceptable ranges.
So now I'm at a bit of a loss.
Is there anything else I can or should test?
Or is this thing most likely toast?
And what the heck do I order to replace it? Radco is out of business.
Sign me- NOT In Hot Water
Comment