The website requires your browser to enable cookies in order to login.
Please enable cookies and reload this page.
The A421 Series Electronic Temperature Controls are single-stage controls with a SPDT output
relay. A421 Controls feature a bright backlit LCD with adjustable brightness and a 3-button touchpad interface that can be set up to restrict user adjustments. An LED indicates the output relay's On/Off status. Standard A421 Series control modules have simple On and Off temperature settings for heating or cooling, an adjustable anti-short cycle delay, temperature setback, and sensor offset
capability.