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[E Yoder]

Should be able to open and close the valve downstream of the pump to see if you have flow. Might be a pump out or at least a broke impeller. If you get flow going you should be able to feel the temp change as you turn up and down.

I think I'm typing simultaneously with wreckit.

[Scratch]

Well... I don't know what I did, but my toesies are warm again.

I noticed when looking at the last picture I posted, that I must have wrote 2.5 on the wall with a sharpie above the mixing valve.  I didn't notice that until I saw the picture here.  So I set it to 2.5, and today I can feel the heat in the floors again.  I did open up a couple valves downstream of the second pump a couple times and got plenty of flow with the first pump off, so I know the second pump is working.  It's possible I had an air bubble in there too, but it didn't seem like it.

I still don't quite understand exactly how the mixing valve works though... I'd still like to know if 1 or 6 is the most or least mixed, but at least it's working again.



I'm ready for summer though....

[wreckit87]

Most mixers have a ~40 degree swing. Put it to 1 and grab the discharge pipe, feel the temp, then turn it to 6 without moving your hand. If the valve is working, you'll definitely find out which is which.

[RSI]

It is hard to find much info on the series 28 valves but it appears that the mix port is straight across from the hot on most of the Esbe mixers. The higher number should be hotter but could do weird things with it the way it is plumbed. I am not sure it can really do much other than slow the flow down to a trickle. Hotter setting might let more water through but I see no reason the cold water would want to come up to the cold port to temper it.
I guess if it working good then no need to fix it but I would move the pump to the right side of the mixing valve. That should make it work properly.

[mlappin]

The thing I’ve noticed about both my Honeywells is they seem backwards, turn em out for hotter temps. Unless yours has left handed threads out should be hotter unless they work completely backwards from a Honeywell.