The Contour of Comfort

Ruud has set a new industry benchmarkfor Home Comfort with the 400-Series blue touchscreen thermostat,specially designed to work with Ruud Ultra Series® modulatinggas furnaces. Plus, it’s designed to be easy-to-view, easy-to-understandand easy-to-operate with simple on-screen programming.

Features & Benefits

  • Bright, 12 sq. inch lighted display (412 & 422 models have lighted touchscreen display)
  • Keypad lockout option
  • Hardwired
  • Easy, menu-driven programming
  • Audio prompting to ensure program change confirmation
  • Intuitive red/blue temperature keys
  • Call for service prompt
  • Humidification and dehumidification control


  • Universal – installer selectable system applications
  • Universal – choice of 7 day, 5/1/1 day programmable or non-programmable (installer selectable)
  • 4 time and 4 temperature settings per program (2 setbacks) heat and cool, or selectable - 2 time and 2 temperature settings (1 setback)
  • Energy savings up to 33%
  • Patented pre-programmed schedule simplifies time and temperature programming


  • Large 12-square-inch touchscreen display - largest in the industry
  • Blue, lighted display for easier low-light viewing
  • Larger, easy-to-read character size
  • Extra-large touch keys for easy operation
  • Clean, uncluttered touchscreen display provides easier navigation

400 Series Thermostat Models




Power Source


Modulating Furnace /2-Stage Cooling

Gas/Oil/Electric/Heat Pump



4-Stage Heat/
2-Stage Cooling

Gas/Oil/Electric/Heat Pump/Dual Fuel



  • Special Applications/ Programmable – easy to use
  • Lighted 12 sq. inch Modulating
  • Furnace & Dual Fuel Touchscreen Models
  • Dual Fuel Capable (Dual Fuel Models include Outdoor Sensor)
  • Humidification & Dehumidification Control



400 Series Special Application Programmable Thermostat


5 years from date of purchase

KwikComfort® Financing can help make your purchase even easier.
Ruud makes it easy to find a financing option that works for you! With many options and benefits available, KwikComfort Financing is the best way to get the home comfort you need without the wait.

  • Applications made easyWe'll help you avoid lengthy contracts, headaches and hassles.
  • Kwik credit decisionsYou'll get an answer to your application within minutes.
  • Fast credit for the futureFinance your Ruud equipment and anything you want to add later.
  • Reduced interest/fixed paymentsGet low interest and fixed monthly payments until the purchase is paid.
  • Minimum monthly paymentTake advantage of convenient monthly payments that fit your budget.
  • Deferred interest/no interestEnjoy interest-free payments as long as the balance is paid by the due date.