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The McDonnell & Miller 166400 is a replacement head mechanism designed for the 94 and 194 control systems. This unit simplifies maintenance by allowing easy swap procedures without disturbing existing piping. The product comes with a standard number 7B switch, making it a reliable choice for various applications.
This replacement part is ideal for HVAC professionals looking to streamline repairs and ensure system efficiency.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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