Argo A1-18 Relay Replacement

Price: $35.00 per pcs

Availability: Ships within 3-7 business days; some items may take longer

Description

A replacement A1-18 relay for an Argo zone control. The relay is the part that actually switches: the thermostat calls, and the relay starts the circulator and brings on the boiler for that zone. When one fails the symptom is a single zone that has gone cold while the rest of the system works normally — which is why the relay, rather than the boiler, is the first thing to check on a one-zone complaint.