2 wire vs 3 wire thermostat

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by d_butka, Feb 3, 2005.

  1. d_butka

    d_butka New Member

    Oct 25, 2004
    Quality Director
    I have Oil fired hot water baseboard heat, with 2 zones. I have wanted to install a programmable thermostat, but I cannot find one that works with 3 wire aquastat.
    What is the difference between 3 wire & 2wire thermostats?
    Is there a way for me to adapt a prog therm. for use in 3 wire system?
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    It has been over 30 years since I worked on wet heat, but I do not ever remember needing a three wire thermostat for just heating purposes. Usually the aquastat has two terminals and the thermostat just switches them on or off.
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: wire wire
Forum Title Date
Plumbing Forum, Professional & DIY Advice Water heater internally wired with 12 AWG wire instead of 10 Apr 7, 2017
Plumbing Forum, Professional & DIY Advice 3 wire well pump , wired directly to pressure switch? Apr 4, 2016
Plumbing Forum, Professional & DIY Advice Electric ground wire between Hot and Cold copper above water heater? Jan 22, 2016
Plumbing Forum, Professional & DIY Advice wireless shut off of main valve Oct 14, 2013
Plumbing Forum, Professional & DIY Advice How to wire emergency well pump turn off? Nov 29, 2011

Share This Page