Just follow the numbers.Pick your old thermostat. Watch it wire up.

16
Numbered push-in terminals
15 to 30 min
Install time
Back of the UST 3.0: push-in pins 1 to 8 on the left, A, B and 11 to 16 on the right, and a phone-style jack in the middle

Pick your old thermostat.

Wire colors can vary. Match by the old thermostat’s labels.

Wiring steps for each thermostat

Furrion

  1. Red +12V goes into 7.
  2. Green ground goes into 8.
  3. Blue goes into A.
  4. Purple goes into B.
  5. Add a short jumper from 8 to 16.

Dometic single zone

  1. Red +12V goes into 7.
  2. Ground goes into 8.
  3. White signal wire goes into 11.
  4. Add a short jumper from 8 to 16.

GE single zone

  1. Red +12V goes into 7.
  2. Ground goes into 8.
  3. White signal wire goes into 11.
  4. Add a short jumper from 8 to 16.

Dometic 5-button

  1. Unplug it from the old thermostat, plug it in here.

Dometic 10 or 12-button

  1. Unplug it from the old thermostat, plug it in here.

Coleman-Mach single zone

  1. Red +12V goes into 7.
  2. Add a short jumper from 7 to 6.
  3. Blue ground goes into 8.
  4. Yellow AC goes into 2.
  5. Heat 1 (furnace) goes into 5.
  6. Heat 2 (heat pump or heat strip) goes into 4.
  7. High fan goes into 13.
  8. Low fan goes into 14.

Coleman-Mach 2-stage

  1. Join both red +12V wires, into 7.
  2. Add a short jumper from 7 to 6.
  3. Join both ground wires, into 8.
  4. Yellow AC 1 goes into 2.
  5. Orange AC 2 goes into 1.
  6. Heat 1 goes into 5.
  7. Heat 2 goes into 4.
  8. High fan goes into 13.
  9. Low fan goes into 14.
  10. No freeze sensor? Jumper 11 to 15.

Heat pump? Join 13 and 14 to the high fan wire. Cap the low fan wire.

Coleman-Mach 8 series

  1. Join red and red/white with a wire nut, into 7.
  2. Add a short jumper from 7 to 6.
  3. Join blue and blue/white with a wire nut, into 8.
  4. Heat 1 goes into 5.
  5. Heat 2 goes into 4.
  6. Purple signal wire goes into 15.

Coleman-Mach 9 series

  1. Join red and red/white with a wire nut, into 7.
  2. Add a short jumper from 7 to 6.
  3. Join blue and blue/white with a wire nut, into 8.
  4. Heat 1 goes into 5.
  5. Heat 2 goes into 4.
  6. Purple goes into A.
  7. Black goes into B.

Airxcel single zone

  1. Red +12V goes into 7.
  2. Add a short jumper from 7 to 6.
  3. Blue ground goes into 8.
  4. Yellow AC goes into 2.
  5. Heat 1 (furnace) goes into 5.
  6. Heat 2 (heat pump or heat strip) goes into 4.
  7. High fan goes into 13.
  8. Low fan goes into 14.

Home thermostat (24V)

  1. R goes into 7.
  2. Add a short jumper from 7 to 6.
  3. C goes into 8.
  4. W (heat) goes into 5.
  5. Y (cool) goes into 2.
  6. G (fan) goes into 13.
  7. Add a short jumper from 13 to 14.
  8. Heat pump only: O/B goes into 3.

No C wire? Most walls have a spare wire, or a C-wire adapter adds one. Home AC needs a small add-on relay. See the install guide.

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