O’Fallon, Illinois Furnace Repair

At Ernst Heating & Cooling, we are furnace repair experts! We repair all types of furnaces—even those we don’t install.

When you need furnace repair in O’Fallon and the surrounding area, call Ernst Heating & Cooling at 618-887-6093 or make an appointment online. We also offer 24/7 emergency repair.

Common Furnace Problems

We’ve been fixing furnaces in the O’Fallon area for more than half a century. We can diagnose and repair any furnace problem! Here are some of the most common furnace repair issues.

Your furnace won’t start up

First: check your thermostat to make sure it’s set correctly. If the thermostat is set right, and the furnace still isn’t starting itself, the problem may be:

  • A malfunctioning pilot light
  • Obstructed gas or propane flow
  • A tripped or blown circuit breaker

Your furnace isn’t getting hot enough

Once again, check your thermostat first. If it’s set correctly, the issue may be:

  • Leaky ductwork
  • A dirty filter
  • Imbalanced airflow in your home

Your furnace is making noise

Here’s a quick rundown of some common noises and their causes:

  • Loud noises when the furnace starts up. A loud pop at startup can indicate a number of problems. Depending on the noise, the issue may be delayed ignition, a dirty condenser, a faulty inducer motor, or a cracked heat exchanger—which is a carbon monoxide danger, so call Ernst right away if this is happening.
  • Rumbling sounds from the furnace. Rumbling may mean that oil is dripping from a nozzle onto the floor and burning. If you hear rumbling, call Ernst right away—oil burning is another carbon monoxide hazard.
  • Rattling or banging furnace noises. A rattle or bang that starts before the blower begins can mean your furnace has a cracked heat exchanger. This is another serious carbon monoxide danger, so, again, call Ernst immediately if you notice this type of noise.
  • Groaning, whining, or humming from the furnace. These noises can happen when something is loose inside the unit, or when there is a problem with your furnace’s bearings.

We Repair All Kinds of Furnaces

At Ernst Heating & Cooling, we have the tools, equipment, and knowledge to repair whatever type of furnace you have in your O’Fallon-area home.

  • Gas furnace repair
  • Oil furnace repair
  • Propane furnace repair
  • Electric furnace repair

O’Fallon Furnace Repair: Safety First

When you have a problem with your furnace, call a professional for service and repair. Gas, oil, and propane are highly flammable and can be extremely dangerous when handled improperly.

We strongly recommend that you have your furnace professionally tuned up and cleaned twice a year to keep it clean and free of potential safety hazards.

Carbon Monoxide Safety

When properly cleaned and maintained, most furnaces do not produce more than a minimal amount of carbon monoxide. However, if your gas, propane, or oil furnace is dirty and running poorly, it can produce a deadly amount of carbon monoxide. We recommend that you install a carbon monoxide detector and alarm in your home, and make sure everyone in your home is familiar with these important carbon monoxide safety measures.

If you ever have questions or concerns about carbon monoxide, please call Ernst at 618-887-6093.

Furnace Repair in O’Fallon, Illinois

Call Ernst Heating & Cooling at 618-887-6093 for furnace repair in O’Fallon and the surrounding areas.

Ernst Heating & Cooling also installs furnaces and provides furnace tune-ups.

Service in Hours- Not Days
What People Are Saying About Ernst
  Reviews for Ernst Heating & Cooling

229 customer reviews

Average rating:5

 
  Very Good so far.
Thank you Mr. Ernst for the heaters until we we get our new furnace and air conditioner and explaining our purchase...
by john d on 10/19/2018
  Furnace check up
Cody did a fantastic job giving our furnace a yearly check up. He was on time, courteous and saw that our hot water...
by mike h on 10/15/2018
  Service was good
We have always had good service from earnest heating and cooling.
by richard f on 10/13/2018
  Was happy with the...
Liked the work completed.
by marvin t on 10/13/2018
  Chris is an...
For Ernst heating Chris is an excellent service representative. He always does a great job and answers all my...
by Jack D on 10/11/2018
More Verified Reviews
Service in Hours- Not Days
Reasons You Should Replace Your Window AC Unit
Posted On:June 25, 2018

Nobody likes the idea of spending thousands of dollars on central air conditioning, which makes the window air conditioning unit an attractive option for those...