HVAC Services McHenry IL | Call Dan's HVAC

Key warning signs include a yellow or flickering burner flame (instead of steady blue), excessive soot or rust around the furnace, a persistent stale or burning smell, and symptoms like headaches or nausea in the home. If you suspect a leak, leave your house immediately and call 911, then call Dan's HVAC for a thorough safety inspection and repair. We prioritize these emergency calls for our McHenry neighbors.

It could be either. Often, it's a faulty thermostat, outdated wiring, or a need for recalibration, which we can fix or upgrade. However, inconsistent temperatures can also point to a deeper problem with your furnace or AC system, like a failing component or ductwork issue. Our technicians will diagnose the root cause—starting with the thermostat—to ensure your entire HVAC system in McHenry is working efficiently and reliably.

We recommend professional maintenance twice a year: once for your heating system in the fall and once for your cooling system in the spring. This proactive schedule for McHenry homes allows us to clean critical components, check for carbon monoxide leaks, test thermostat accuracy, and catch small issues before they lead to a breakdown on the coldest or hottest day. It's the best way to ensure safety, efficiency, and longevity for your equipment.