Prestige IAQ 2 Wire Thermostat, 18-30Vac, Heat-Off-Cool-Auto-Emergency Heat System Switching, Auto-On-Circulating-Follow Schedule Fan Switching, 8.06 Square Inch Display, 7 Day Multiple Day Programming or Non Programmable, Auto or Manual Changeover, Screw terminals, 5-90% RH Non Condensing Operating Humidity Range, 10-60% RH Humidification Setting Range, 40-80% RH Dehumidification Setting Range, 322-120 Degree Operating Temperature Range, Hardwired, Tri Lingual Display ( English, French, Spanish ), Used with Thm5421R1021 Interface Module and Accessories, Front is White, Sides are White

Existing reviews

Helpful Product Insight

After dealing with a situation where the appliance suddenly stopped working properly, we installed this replacement part. Unit completed a full cycle without issues. Packaging was decent and part arrived undamaged.

From: Peter | Date: 10/8/2025 9:36 AM

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Helpful Product Insight

Had to double check model compatibility first while replacing the old component because the appliance suddenly stopped working properly. Repair solved the original problem.

From: Scotty | Date: 2/20/2026 8:36 AM

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Replacement Observation

Ended up ordering this because the older unit needed replacement part. Took around thirty minutes from start to finish. Noise issue disappeared after replacement. Packaging was decent and part arrived undamaged.

From: Guest | Date: 4/24/2026 9:36 AM

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