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Quick Steps In Setting DIP Switches On A Carrier Furnace

Quick Steps In Setting DIP Switches On A Carrier Furnace

DIP switches allow for the many settings on a Carrier furnace that control how the system functions. How to set DIP switches on the Carrier furnace may be something you’re curious about.

You must first be familiar with each setup switch’s function or description in order to set the DIP switches on the Carrier furnace. After that, configure them by sliding each switch ON or OFF in accordance with your tastes and requirements.

It is easy to configure DIP switches on the Carrier furnace. However, if you don’t know how to, it might be a nuisance.

How Do DIP Switches Work?

Quick Steps In Setting DIP Switches On A Carrier Furnace

A mechanical or electrical switch with only two settings is called a DIP, or dual in-line package switch. It can be hot or cold, on or off, low or high, yes or no, etc. These various settings offer functionalities based on user preferences and demands and can be altered for various working scenarios.

The Carrier furnace has four DIP switches: SW1, SW2, SW3, and SW4. SW1 features eight setup switches, compared to three for each of the others.

Two parallel bars make up a DIP switch. The contacts on the first bar are open in the “regular” position, but the contacts on the second bar are closed.

Shifting these bars involves pressing the bar downward. Once you press down on the bar once again, the contacts will remain in the “set” position.

How A DIP Switch Works On A Carrier Furnace

A DIP switch is used to choose between two possibilities. You can momentarily turn off the power to the Carrier furnace using DIP switches.

The Carrier furnace will automatically switch on if it is set to “auto,” which is frequently the case, when there is a significant demand for heat. The Carrier furnace cannot be turned on unless the switch is turned to “on.”

You can turn on the Carrier furnace by manually adjusting the thermostat to the preferred setting once the switch has been set to “on.” Simply switching the switch back to “off” will also turn the Carrier furnace off. You can also modify the setting of another switch using DIP switches.

For instance, if your Carrier furnace includes an integrated humidifier, you can turn it off simply flipping a switch on the furnace. Additionally, you can turn it on so that you can set a precise interior humidity level. You may use your controller to turn on and off the Carrier furnace thanks to this built-in setting.

In addition to this, a Carrier furnace can be turned on to function as a timer. For instance, you can program the Carrier furnace to run for a set period of time before turning off till the following day. If you want your Carrier furnace to operate less frequently, it is also a terrific approach to aid with energy conservation.

How To Configure The DIP Switches

Quick Steps In Setting DIP Switches On A Carrier Furnace

Turn off the electricity to the Carrier furnace first before configuring the DIP switches. To remove the cover plate, a screwdriver would be useful. Additionally, get a pencil and a notepad ready to record the settings. The four DIP switches’ respective roles are listed below:


The switch is labeled “Status Code Recovery.” Its default setting is OFF. You can turn on the R thermostat lead while it is disconnected to get up to 7 status codes that have been saved for help with troubleshooting.

This switch only works with “Low Heat” (Adaptive Heat Mode when SW1-2 is OFF). Its default setting is OFF. When SW1-2 is turned OFF, a single-stage thermostat can operate in two stages.

When using a 2-stage thermostat, you can toggle it ON to allow Low Heat operation when R to W/W1 closes. Similar reasoning applies if you want to permit High Heat operation while R to W/W1 and W2 are closed.

Here is where the switch for “Low Heat Rise Adjustment” is. It is turned off by default. It can be turned ON to increase Low Heat airflow by 18%. The bypass humidifier compensates for the rise in air temperature return.

This switch, labelled “Comfort/Efficiency Adjustment,” is currently turned on by default. By turning ON, you can lower the airflow for low heat by 20% for 90% of the models or 16% for 80% of the models and for high heat by 15% for 90% of the models or 0% for 80% of the models.

Switch “CFM Per Ton Adjust” is managed by SW1-5. It is turned off by default. Activate 400 CFM per ton. OFF for 350 CFM per ton. Similar to SW4,

The default setting for this switch, which is for the “Component Self Test,” is OFF. You can turn on Component Self Test for troubleshooting assistance when the R thermostat lead is disconnected. Self Test can be turned off once it’s finished.

SW1-7 & SW1-8
There is no usual position for either switch; both are for “Blower OFF Delay.” Your selected heating mode blower-off delay will determine how long it takes. The preferred blower-off delay for the heating mode ranges from 90 to 180 seconds. Both SW1-7 and SW1-8 turn off at 90 seconds. SW1-7 is then ON while SW1-8 is OFF for 120 seconds, and SW1-7 is OFF while SW1-8 is ON for 150 seconds. SW1-7 and SW1-8 are both ON at 180 seconds.


SW2 controls the air conditioning (A/C) system. The AC setup switch selects the desired cooling for two-stage units or the high-stage cooling for airflow.


Continuous fan (CF) setup switch SW3 is used. For two-stage cooling systems, the CF switch position is the low cooling airflow setting. Be aware that SW3 cannot be configured to have an airflow greater than SW2.


It is the switch labeled “CFM Per Ton Adjust.” Its default setting is OFF. When used with SW1-5, this switch offers extra CFM per ton options. When SW4-3 ON and SW1-5 OFF, you’ll observe a minimal 325 CFM per ton.

When SW4-3 is off and SW1-5 is on, you receive 350 nominal CFM per ton and 370 nominal CFM per ton, respectively.

You can restart the electricity once the Carrier furnace DIP switches have been set.

Why Are DIP Switches Configured On A Carrier Furnace?

You might be perplexed as to why your Carrier furnace requires DIP switches to be configured. Here are a few of the many reasons why you might want to set DIP switches on the Carrier furnace.

One explanation is that if the DIP switches are not properly configured, the Carrier furnace won’t function properly. The efficiency of the Carrier furnace will depend on how well it operates in heating your home. Additionally, the Carrier furnace won’t last as long as it ought to.

It’s crucial to keep in mind that every time you turn on your Carrier furnace, the DIP switches will reset. Therefore, with the DIP switches’ settings selected, the Carrier furnace will turn on.

If your house is in a high-electricity-use location, installing DIP switches on your Carrier furnace will also help you save money because you may manually lower the power going to the appliance. As a result, your electricity bill will cost less.

If you intend to put a new humidifier or dehumidifier in your house, that is another reason you might want to configure DIP switches on the Carrier furnace. In this instance, you must adjust the Carrier furnace settings to correspond with the brand-new equipment settings.

Or perhaps you merely wish to adjust the Carrier furnace’s operational settings. You might wish to run it for a given amount of time, regulate the temperature, or adjust the indoor humidity, for instance.

Tools For Setting DIP Switches On A Carrier Furnace

Quick Steps In Setting DIP Switches On A Carrier Furnace

The following tools are required to configure DIP switches:

  • Screwdriver: To open the panel on the Carrier furnace and take off the digital thermostat’s cover plate.
  • Circuit Tester; Often known as a multimeter, it helps test and detect whether a circuit is functioning properly or has a short circuit.
  • Pencil & Note Pad: To jot down the settings.
  • Tape Measure Or Ruler: Used to gauge the size of the circuit breaker or switch.
  • Digital Thermometer: Used to determine the furnace’s internal temperature.

You can quickly configure the DIP switches on your Carrier furnace using these tools.

Final Thoughts

It’s crucial to set the DIP switches on your Carrier furnace. If the DIP switches are not properly configured or have a long lifespan, the Carrier furnace will not operate effectively. If you adhere to the directions in the manual, you can configure the DIP switch settings.

It would be preferable to call a technician if you are unclear of your Carrier furnace’s DIP switch settings.

Quick Steps In Setting DIP Switches On A Carrier Furnace

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