You might find this article helpful, especially if you’re looking for answers to Furnace Repair and Troubleshooting questions.
Poetic Fact: A furnace on the fritz is generally the pits!
In all likelihood, your current furnace repair and troubleshooting issue is either…
- Your furnace won’t start up or continue running
- Your furnace distributes no heat (or not enough)
This article will address both of the above issues.
Other possibilities (which will not be covered here) include: strange noises, abnormal smells, water leaks, operating inefficiencies, and so on. Please call us for answers or assistance with these less common issues, or for any other furnace repair and troubleshooting situation you may have.
Your furnace won’t start up or continue running
Troubleshooting Tip #1: Make sure your thermostat is set to “Heat”
- Sure this may seem like a no-brainer, but it’s a common oversight, especially when multiple people have access to the thermostat. Always check this first, just to be certain.
Troubleshooting Tip #2: Check your circuit breakers (or fuses)
- If the circuit to your furnace has been tripped (for any reason) the furnace will not start. Use a flashlight to visually inspect that all the circuits are unbroken. Correct any tripped breakers or blown fuses. If the furnace circuit continuously trips, you should call for assistance.
Troubleshooting Tip #3: Check your furnace switch
- There should be a switch (like a light switch) mounted on the side of your furnace. Make sure it is in the upright (“on”) position. If, for any reason, this had been switched off, your furnace should now start up after a short delay, usually within a couple minutes.
Troubleshooting Tip #4: Verify LED diagnostic service code errors , if available
- Newer furnaces often provide information regarding operating status and errors in the form codes, which can be cross-checked against your owner’s manual. On certain models, the codes may be available via a glass peephole. In the event you need to call for repair or further troubleshooting, having these codes handy will save time.
Your furnace distributes no heat (or not enough)
Troubleshooting Tip #1: Again, make sure your thermostat is set to “Heat”
- If air is blowing out, but the air is cool, your thermostat may actually be set to “Fan” mode, which moves air but not heat.
Troubleshooting Tip #2: Check to ensure your supply vents are opened or closed, as desired.
- It is common for supply vents to have manual air dampers, which control the flow of air into rooms. If only certain rooms are not getting warm (such as upstairs rooms or rooms with outside walls), you may want to adjust the dampers to force more air to cold rooms, while allowing less air into warm rooms.
Troubleshooting Tip #3: Change air filter, especially if over 3 months old
- A dirty air filter can cause many problems. Modern equipment is highly efficient and requires clean air flow to operate correctly. As part of your general troubleshooting, you might as well change the filter to eliminate it as a possible cause. Service technicians will often replace dirty filters as step one, before moving on with more advanced diagnostics.
Troubleshooting Tip #4: Check for disconnected, blocked, or leaky supply ducts
- Use a flashlight to inspect the supply ducts, especially those exposed in the basement or attic. Make sure that nothing has been knocked loose or jammed up accidentally by a wandering cat or a flying football. Anything out of the ordinary should be fixed.
Knowing When to Call for Repair…
Warning: In no event should you open the furnace to “poke around” inside.
Most of the time, if the above troubleshooting tips do not solve your issue, you should contact a local repair technician for more advanced diagnostics. It will often be something very simple for a trained professional to fix, such as a loose wire inside, a reset switch specific to a manufacturer, or a number of other simple (or complex) items. The cost for professional assistance is fairly priced, so have no fear in calling for help!
What’s most important is that you call a trusted professional.
Then rest assured.
Oehl HVAC handles Furnace Repair and Troubleshooting for all brands
Our service area is Coralville, Iowa City, North Liberty, Cedar Rapids, Fairfax, Walford, Williamsburg, Tiffin, Hiawatha, and all surrounding towns within a reasonable distance of our home office, located in Amana, Iowa.
Until Next Time…