How to Test Your Boiler Thermostat - Frederick Air, Inc.

How to Test Your Boiler Thermostat

If you have a boiler that heats your home; you may wonder if you can test the thermostat yourself.  The answer is yes!  You may wish to do this before the season starts to make sure you are prepared for winter or you may find the need if you think your system is not working properly.  Either way, in a few short steps you can possibly get the information you are looking for.

Quick Checklist to Test Your Boiler Thermostat 

To make it even easier for you, we created a printable version of the Testing Your Boiler Checklist that you can download and print for reference.

  • Turn the thermostat “off” and wait for 15 minutes.
  • Make sure all switches and circuit breakers are in the “on” position.
  • Check and see what temperature the thermostat is displaying.
  • Make a note of the temperature and then switch the system to “heat.”
  • Now adjust the temperature to about 10 degrees higher than the temperature you previously noted.  For instance, if the temperature was 70 degrees you will want to set the thermostat to 80 degrees.
  • Observe the system for 10 minutes.  Head over to your boiler.  You should notice some action occurring.  You should hear the burners firing, a pump running, or steam generating, or you might see pressure on a gauge start to build up.
  • Assuming that you see or hear some action at the boiler, feel the pipes that are coming out of the boiler.  They should start to feel warm or even hot.  Be careful because they may heat up quickly and could be hot enough to burn your hands.
  • Walk through the home and feel the radiators or heat vents to see if they are getting warm.
  • Write down any areas where the radiators or heat vents are not getting warm.

What if my furnace or boiler won’t start?

While gas furnaces and boilers are efficient, they can have problems like any other mechanical system. When the temperature in your home drops below a comfortable level, you will wonder to yourself: why won’t my heater turn on? There are several common reasons why your boiler or furnace won’t ignite and we dive into these reasons in this article. A few troubleshooting steps that you can take to help you to determine the cause.

What if there is no heat?

If you see no response at the boiler and there is no heat generated, it is time to call a professional service company and have a qualified technician come out to take a look and perform a system diagnostic. We’re available 24/7 to take your call at 301-663-0300.

Should you replace a furnace before it breaks?

On the one hand, replacing a furnace before it breaks can save you money in the long run. Not only will you avoid the cost of an emergency repair, but you’ll also be able to take advantage of current furnace models that are more energy-efficient than older models. This means your utility bills will be lower, which will help offset the cost of the new furnace over time. We also have financing options available to make it easier for you. Newer furnaces tend to have longer lifespans than older models, so you may not have to replace them again for many years.


A cold home is an uncomfortable place to be. If you are concerned about your boiler not working properly, the chances are that you need a system checkup. Give us a call at 301-663-0300 or book your next appointment online. We are happy to help.

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