Zone valve end switch problem


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Old 11-23-07, 02:21 PM
J
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Zone valve end switch problem

My house has hydronic baseboard heating with 3 zones, and when the thermostat switches zone #2 on, the boiler does not fire up. However, when zone #1 switches on, the boiler fires up and zone #2 starts emitting heat.

The internet overlords tell me that this is because the end switch on the zone valve for zone #2 is faulty. Does this sound correct?
 
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Old 11-23-07, 02:33 PM
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The internet overlords tell me that this is because the end switch on the zone valve for zone #2 is faulty. Does this sound correct?[/QUOTE]


Yes.
 
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Old 11-23-07, 07:56 PM
J
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Thanks! Next question - to fix the problem, does that involve replacing the whole valve, or can just the switch be replaced?
 
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Old 11-23-07, 07:59 PM
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For a typical Taco or Honeywell zone valve, you replace the powerhead, not the whole valve assembly. It's removable.
 
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Old 11-23-07, 08:03 PM
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What kind of Zone Valves do you have?

Electric motor driven or heat motor type (TACO).

The electric motor types use microswitches which can be replaced ifyou are handy with electronics/electrical work. Otherwise you simply replace the power head and leave the valve alone.

Taco power heads have an open switch leaf-spring/contacts assembly that can fail due to heat damaging the plastic spacers..

Pete
 
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Old 11-27-07, 07:07 PM
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I have Honeywell zone valves, so I believe it is motor driven. Is the powerhead easy enough to replace on my own? What is involved?
 
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Old 11-27-07, 07:11 PM
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Originally Posted by jbreedlove
I have Honeywell zone valves, so I believe it is motor driven. Is the powerhead easy enough to replace on my own? What is involved?
Should be easy to change. Post the model number of the valve. Someone will probably be able to tell you how to do it, where to find parts, and give you a link to the PDF file on the Honeywell site for your valves.
 
 

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