How Do I Know If My Thermostat Should Be Set To Gas Or Electric?

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Any home with central air conditioning or heating relies on a thermostat to function properly. You can maintain the temperature in space consistently by using a thermostat to monitor temperature variations. A thermostat can help you save money on your high electricity bill if you use it. So, the question is How Do I Know If My Thermostat Should Be Set To Gas Or Electric? The thermostat relies on valves, relays, and switches to provide electrical signals when the room’s temperature rises or decreases.

How Do I Know If My Thermostat Should Be Set To Gas Or Electric?

There is only one distinction I can think of: if the thermostat operates the fan blower for a longer period after the unit goes off for one over the other to utilize the remaining heat. When a gas furnace’s thermostat requests heat, the 24 volts from the thermostat notify the run ace it’s time to fire up.

Know If My Thermostat Should Be Set To Gas Or Electric

The furnace itself determines the operation sequence of the furnace. Before turning on the fan blower, it performs a pre-purge to ensure the induced draught blower is working properly and remove any remaining exhaust gases. Next, it switches on the gas, the igniter, then checks to see whether there is a flame.

In an electric furnace, 24 volts are used to power heat sequencers. The heaters are little components having a heater inside of them. “At varying temperatures, the heater’s bimetal strips snap shut, allowing electricity to flow through the contacts.

There will be 2–3 sets of contacts on the first sequencer. Fans should start with Set 1. The heater’s temperature should be enough to close the second and maybe third set of contacts after around 30 seconds. One or more heating elements were reactivated as a result of this action.

Having a second sequencer will prevent overloading the breaker from the multiple sequencers turning on all at once, as the first one will have all contacts turned on. It is wired so that if any of the sequencers is powered, the fan will run on them.

Regardless of whether or whether the thermostat activates the fan, it is controlled by the furnace, not the thermostat. It controls the fan only when the thermostat is set to auto, and the heating system is turned off. For an electric furnace, the gas should pose no problem.

Why Is My Honeywell Thermostat Set To “Hot” Yet Blowing Chilly Air?

  1. Considering your question is vague, and I can’t speak with you directly, I’d like to suggest the following course of action. An experienced HVAC technician should be called. There appears to be an electrical problem. These are the issues that could come down to it.
  2. In this case, the thermostat is to blame. To fix this issue, you would need to replace the thermostat. As a homeowner or technician, you’re not alone if you’ve made this blunder. They tell me what happened and what they’ve done when I arrive. Temperature-related issues are often solved by simply changing the thermostat setting. As a result of this behavior, I decided to swap out the Tstat to fix the issue.
  3. Wiring is the source of the issue. The thermostat wires are shorted between the thermostat connections and the thermostat connections within the indoor unit or between the indoor unit and the outside unit because of the damaged insulation. Some of the wirings may be outdated, and the insulation is practically shedding. Someone might have fooled with the state and not correctly stripped the wire ends if the state was replaced. Because the cables were in the way of the mouse’s journey, they may have been chewed through. Anything you can think of, I’ve seen.
  4. Indoor or outdoor unit controls are to blame for the issue. An incorrect diagnosis, “I couldn’t find anything else wrong, so I changed the control board,” is a common one. “Why?” That is because it would not function properly. The problem has not been resolved. It’s not uncommon. Previously mentioned rodents may be to blame. Some relays and safeties can be shorted out in older systems that don’t have a circuit board.

Of course, hiring a professional will cost you money, but most homeowners have reported saving money by hiring a professional during the previous quarter of a century. What appears to be a straightforward do-it-yourself project can quickly spiral out of control.

One day, I received a panicked call from a homeowner who couldn’t get their system to operate. When the system wouldn’t start, he’d replaced the thermostat. He fooled around with it and messed around with it until he got it just right. Late on a Friday night, he finally succumbed and made the phone call.

I determined that a shortage in the wiring was the root cause of the problem after investigating the issue from various angles. In addition to destroying the thermostat, he also damaged the control board and transformer. As luck would have it, I had a spare control board on hand. The thermostat, wiring, circuit board, and transformer were changed, and the system is now operational.

Someone may have snipped a wire or driven a nail or staple too close; I don’t know other than that it showed continuity when I ohmed them out. If my memory serves me correctly, they were in the middle of huge DIY home renovation work. Unfortunately, the wire and thermostat caused damage to the control board and transformer. Even a seemingly insignificant problem can cause damage in the tens of thousands of dollars.

Should My Thermostat Be Set On Gas Or Electric?

Technically, both settings are acceptable. If an electric furnace is set to gas or vice versa, there shouldn’t be any issues.

Is My Thermostat Gas Or Electric?

You can quickly determine whether your heater is electric or gas with a simple visual inspection. You have a gas heater if you inspect your heating system and see a flame. You can easily see the flame via the little window on your heating unit, which is often blue.

Should I Use Gas Or Electric Heat?

Electric heaters are less expensive, more straightforward to install than gas heaters, and do not require a chimney. However, gas heating has lower operating expenses because gas is typically cheaper than electricity, and gas heaters are better at warming up more excellent spaces. In tiny spaces, electric heaters may be more cost-effective.


Thermostats are thermally activated switches, and that’s all they are. A relay in the furnace is used to turn on and off the heater. The thermostat activates the relay, which activates the furnace’s thermostat. Is it clear, “How Do I Know If My Thermostat Should Be Set To Gas Or Electric?” So, it doesn’t matter if your electric furnace has a contactor relay or a gas furnace relay activated. It’s fine if it works.

Frequently Asked Questions

What is the purpose of a thermostat on a gas heater?

When you switch on your heating, airflow, and air conditioning (HVAC) system, you could argue that your gas furnace starts the house-heating process. However, in most houses, the thermostat truly controls the show.

Is it possible to retrofit a gas heater with a thermostat?

There are a plethora of thermostats available for mounting on the heater itself. Temperature sensors can be found on lower wall sections near the floor. Think about it: There must be a method to regulate the thermostat without bending over. That’s where wall-mounted thermostats come in.

Without electricity, can a gas heater be used?

Electricity is required in most circumstances for the gas furnace to function. Homeowners, however, can take steps to guarantee their health, safety, and comfort in the case of an electricity outage.

How does a gas heater’s thermostat work?

The internal expansion of the metallic strips in mechanical thermostats allows them to regulate heat. The heating is activated by this strip of wire connected to the circuit. The metal expands when the strip heats up, shutting off the heater and cooling the area.

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