for v8043e1012 Zone Valve Honeywell, 40003916-026 Power Replacement Head, 40004850-001 (Lid Model) 2-Way 4-Wire, Normally Closed 24Vac 50/60Hz 18" Leads with End Switch for Honeywell Zone Valve Motor

Works great

Good price, direct replacement

Not Honeywell brand but does work. I just had to keep the mounting screws a little loose. If tight it will not operate at all. Easy to replace though

The valve works until you install it, then flexes out of shap binding up the gear drive. Will open but not return. If I loosen up on side completely then it returns, but still erratic. To me the gear drive on motor is bent just a few degress to create this binding. Replaced oem motor with my old motor with a straight shaft and now working, but now issue with end switch making. Might be resetting of motor position now ? Would not buy again. UPDATE; Seems the motor plate is not formed to specs, about .1 " out of shape over the shaft drive indention, Gear plate slips out of place because of play, spacing. Just a slight pressure on manual handle holds it in place to work. My guess metal mounting plate 90 bent legs are not 90 degrees sharp bend, leaving middle to bulge up out of place. Poor quality control and testing. Or the drive stamping is to shallow to fill in gap. Oh yeah, a 10 warranty, LOL.

If you were to ask me what this was a year ago, I wouldn’t be able to tell you. I purchased a new home and these were on my oil burner. Last year in the summer, my burner wasn’t making hot water for my holding tank. A friend of mine looked at it and found that this device (circulator valve) wasn’t working right, but once we took off the cover, it was fine. I kept the cover off but went on Amazon to order this one, same numbers.I received it in a day but never replaced it because the old one was still working with the cover off.One year later, two weeks ago, one of the coldest days of the year, my burner was struggling to keep the home’s temperature at 62 degrees. I called a technician and he looked at it and told me the other circulator valve went bad. I pulled the new one that I had sitting around out and he replaced it, restoring my heat. The bill? $155. To me, that’s a win! Now I purchased this replacement for my hot water circulator valve for when it goes bad. So, yes, they work well.

I bought this as a replacement for the original zone valve that was malfunctioning. It was an easy swap and everything is functioning well

Exact replacement of the Honeywell original

These units seem to fail every 5 years or so. I now keep a spare in the house so the reparman only has to make one trip.