floor heat?

[jtribuzio (Joseph Tribuzio, 450.003128)]

Im betting this is the control unit for the electric under tile radiant heat.
Am i correct?

what are some things that can go wrong with them?

[jtribuzio (Joseph Tribuzio, 450.003128)]

or are they electronic zone controls? with big relays or the like.

[jtribuzio (Joseph Tribuzio, 450.003128)]

got it

http://www.argocontrols.com/product_detail.asp?key=62

[dandersen (David Andersen, TN HI# 40)]

Zone vlave control.