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A 3-flash or 4-flash code typically indicates the switch is failed to close or is stuck
Built for high-heat durability
Common Questions & Technical Support: What units is this thermostat compatible with
along with a customizable lockout service message
Resideo AT120A1004 Transformer Els PW 29614 A 3-flash or 4-flash codeThe Resideo AT120A1004 is a versatile, high reliability 20VA foot mount transformer engineered for integration into 24V control circuits. This multi tap power source supports 120V, 208V, and 240V primary input configurations, providing a stable 27V secondary output at 60Hz. Designed for the rigors of field service, the AT120A1004 offers multiple mounting options, including foot mounting or plate mounting on standard 2x4 or 4x4 outlet boxes. With
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