Posted by Harold Kestenholz - Hydronic Network on September 27, 2001 at 13:18:35:
In Reply to: Honeywell switching relay posted by Tom H on September 26, 2001 at 18:28:05:
If you can turn on the circulator by pressing on the relay, the relay contacts are good. Something in the 24-volt circuit is not pulling in the relay. The relay coil in that control rarely goes bad, so it could be the thermostat in that zone, the wires, or the transformer in the relay. You can test if the relay is OK by disconnecting a thermostat wire on the T terminals and putting a jumper from T to T terminal. If the relay pulls in, there is something wrong in the wiring or thermostat.
Honeywell can not warranty a control that has been repaired by alteration with an old relay. The relay portion is usually sold after it has been removed from an old one. The price of a new relay is not extremely high and you gat a new high limit and a new warranty with it.
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