Honeywell RTH9585WF Wi-Fi Color Touchscreen 7-Day Programmable Thermostat ROOM-UNEVEN Error Fix: Uneven Temperatures Between Rooms

Error code ROOM-UNEVEN on the Honeywell RTH9585WF Wi-Fi Color Touchscreen 7-Day Programmable Thermostat means: Uneven Temperatures Between Rooms. Some rooms are significantly hotter or colder than the thermostat reading — this is not a thermostat error but an HVAC system balancing issue; check that all supply vents are open and unblocked, verify the air filter is clean, check for disconnected or leaking ductwork, and on WiFi models with remote room sensors (T9, T10 Pro) configure which sensors participate in the comfort profile

The most successful fix is "Inspect and Repair Ductwork for Leaks or Disconnections" (hard difficulty, ~90 minutes). Estimated DIY cost: $10-$30. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Inspect and Repair Ductwork for Leaks or Disconnections") is rated hard difficulty and takes about 90 minutes. Tools needed: Utility knife, Foil tape, Work gloves, Flashlight.

DIY cost: $10-$30. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Honeywell RTH9585WF Wi-Fi Color Touchscreen 7-Day Programmable Thermostat has 8 other known error codes, including: APP-OFFLINE (Thermostat Shows Offline in App), AUX-HEAT ("Aux Heat" Displayed), BLANK-SCREEN (Blank/Dead Display — No Power), BLOWN-FUSE (HVAC Control Board Fuse Blown), COOL-ON-FLASH ("Cool On" Flashing on Display), and 3 more.

Error code ROOM-UNEVEN also appears on 7 other Honeywell models: RTH7600D 7-Day Programmable Thermostat with Backlit Display, T10 Pro Smart Thermostat with RedLINK Room Sensor, T6 Pro Programmable Thermostat (TH6320WF / TH6220U), T9 Smart Thermostat with Smart Room Sensor, TH4210U2002 PRO 4000 5-2 Day Programmable Thermostat, TH6220D1028 FocusPRO 6000 2H/2C Programmable Thermostat, and 1 more. The fix may vary by model, so check each model's specific page for tailored repair steps.