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(Almost) everything you ever wanted to know about thermostats

A thermostat is a component of a control system that is used to keep the system temperature at a desired level by detecting the temperature around it. Hunter is a well known brand and Hunter thermostats are widely used across the country as control units in heaters and air conditioners among other things. Incorrect wiring, faulty parts, inadequate working knowledge and the inability to clearly understand Hunter thermostat instructions are usually some of the reasons why people may face problems when using a Hunter thermostat. Listed below are questions on Hunter thermostats that have been answered by the Experts.

How to install and wire a Hunter 44155C digital thermostat?

  • The thermostat as 5 wires that need to be connected to the right ports.
  • The red wire connects to the RC/RH port while leaving the jumper as is.
  • The yellow wire connects to the Y/1 port
  • The green wire connects to the G port
  • The white wire connects to the W/B port
  • The blue wire is connected to the Y/0 port.
  • The HG/HE switch behind the thermostat is set to HE

It is important to remember that there may be a time delay for the heater to start up after the connected are in place.

Hunter thermostat model no 44272 alternates between heating and cooling when the connecting wire is moved between the RH and RC terminals. Why is that so?

The RH provides power to the heating elements. The RC provides power to the cooling elements. Placing a jumper between the RH and RC and inserting one end each in the RH and RC terminals before connecting the existing wire to either terminal may help solve the problem. The jumper can be made by stripping the ends of a small piece of the thermostat wire.

How to reset Hunter thermostat model 44150b?

The reset button is under the day/time button in front of the thermostat. It can be pushed in with a paperclip to change the settings. All day and timing settings should be reset. Refer to the thermostat manual for more detailed information on the programming.

How to install the 40135 model of Hunter thermostat? The wiring to the oil furnace consists of yellow, red, green, white and orange wires.

According to the Hunter thermostat wiring configuration, the red wire goes to the R terminal. The white wire to the W terminal, the green one to the G terminal and the orange one is used for backup heat and air conditioning and either goes to the RH or RC ports. Ensure that all the terminals are correctly matched. The jumper wire can be left as it is.

If the furnace does not start after setting these connections, it could be because of a blown automotive type spade fuse of 3 AMP or 5 AMP on the furnace control board. A blown transformer can also cause a problem. This can be confirmed by jumping the red and white terminals on the furnace to check if the heat turns on. Remember to lose the furnace door before testing as it usually has a door switch that blocks power supply if the door is left open.

How to connect Hunter thermostat, model no 44127 that uses 7 wires to a Rheem RPKA-030JAZ heat pump? The old thermostat uses 6 wires.

In a single stage heat pump with heat reversing, the L port is usually unused and the other wires are connected in the following way:

  • The blue wire goes into terminal B which is for the heat relay valve.
  • The red wire goes to R which is the 24V AC terminal.
  • The green wire goes to terminal G which is for the fan relay.
  • The yellow wire connects the compressor contactor to the thermostat through terminal Y.
  • The white wire goes to terminal E which is generally for auxiliary heat.
  • The terminal C is for the brown wire where C stands for Common.

Hunter thermostats come in a variety of models with different working mechanisms. Certain problems can be difficult to handle by a person not equipped with the right experience in troubleshooting these kinds of issues. If you run into trouble with your Hunter thermostat, direct your queries to the HVAC Experts now. They can offer valuable insights and suggestions to solve your problem both quickly and at an affordable cost.

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