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Honeywell v8043e1012 Zone Valve

The V8043E1012 Honeywell zone valve is one of the most common zone valves installed on many hydronic hot water heating systems. This zone valve has been a rock solid staple in the heating industry for many years.

It is a simple two way on-off low voltage valve that consists of two parts. There is an actuator that has a motor and an end switch, and then there is the valve assembly that controls the flow of the water.

The actuator contains a small 24v synchronous motor to open the valve and hold it open as long as power is supplied to the motor. When power is turned off the spring loaded return pulls the valve back shut. The power to the motor can be control through any low voltage thermostat. Power consumption is only 7.7va so up to 6 valves can be controlled from one 40va transformer. The actuator also has a manual open feature that allows you to manually open the valve in the event of a power failure. The valve will then return to normal operation when the power is restored.

In the event of an actuator failure the motor or the whole actuator can be replaced without removing the valve or draining the system. The replacement process is very easy and can be performed in a matter of minutes. The process only requires the loosening of two screws and the change over of the wiring.

The valve assembly is normally a straight through design that is built in such a way so that the valve can be installed without disassembly. The simple ball design is such that the ball is suspended inside the valve without touch any metal in the fully open position. This allows the valve to be soldered in the piping fully assembled. Each time the valve is opened and closed the ball is turned slightly which keeps dirt from building up at one spot and creating a leak. This also allows for even wear on all surfaces and therefore this valve virtually does not ever wear out from use.

There are some failures in these valves after years of use. The most common things that go wrong are the failure of the motor and the wearing out of the gears inside to the point where they skip and do not open the valve. The end switch will give problems on rare occasions.

Overall after installing hundreds of these valves I rate them as one of the best zone valves on the market. They are easy to install and service. Considering the wear and tear that a zone valve receives the total number of failures seen with these valves is very minimal.


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1 Answer

why will it no shut off flow

The valve is defective electrically or mechanically.

Sep 25, 2015 | Honeywell "Motorized Zone Valve V8043e1012

1 Answer

wiring a Honeywell V8043E for two zones

Honeywell posts pdf manuals.
Google seArch Honeywell V8043E .pdf
Include .pdf in search parameter to find manual with wiring diagrams.

Oct 26, 2012 | Honeywell V8043E1012 Zone Valve 3/4 Sweat,...

1 Answer

MY APARTMENT HAS ELECTRIC WATER BASEBOARD HEATING SYSTEM, I found out the heat cannot be turned off even I disconnect the honeywell thermostats (only one on the wall for the whole unit - living room and 2 bedrooms), and I even turned off the electric supply in the fuse box, but heat keep coming out, I have to leave window opens to ventilate hot air. No hot water tank in the unit, it is coming from the building's central boiler. What should I do to gets the heating baseboard turn off?

Okay couple questions here because either you have hot water baseboards or you have electric baseboard heaters.
- if the system is a hydronic baseboard heater fed form main boiler, usually this means your space heat is controlled by a zone valve which the zone valve is controlled by your thermostat.
-if you find the zone is controlled by a zone valve than it is possible the zone valve is defective causing hot water to bleed past the zone valve even though your t-stat is telling it to close.
- first find out what excatly the baseboard is heated by either water or electricity
-next personal message me and I can walk you through it

May 29, 2017 | Honeywell Heating & Cooling

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