What Does Soot Around an Oil Furnace Mean?
Black soot or smoke near an oil furnace is not normal. Learn what it may indicate, when to stop using the system, and why professional diagnosis matters.
Heating
Why Is My Oil Furnace Running but Barely Blowing Warm Air?
Furnace running but rooms still cold? Learn how weak airflow differs from weak heat, what to check safely, and when an oil-furnace technician should investigate.
My Oil Tank Has Fuel. Why Is There No Heat?
The oil tank has fuel, but the furnace will not heat? Follow safe homeowner checks and learn why fuel flow, ignition, or controls may still need service.
Why Does My Oil Furnace Reset Button Keep Tripping?
Oil furnace reset button keeps tripping? Learn what burner lockout means, why you should reset only once, and when to call Hillside for a proper diagnosis.
Oil Furnace Heat Exchanger: What It Does and When to Replace the Furnace
What does an oil furnace heat exchanger do, and can it be repaired? Learn which signs call for diagnosis, when replacement is safer, and how furnace age and warranty affect the decision.
Back to School Means Cold is Coming
Back to School Means Back to Heating Homework The kids are heading back to school, which means the summer chaos
Furnace and A/C Replacement: Why Bundling Both Can Pay Off
Two Comfort Systems, One Smarter Plan If your furnace and air conditioner are both getting older, it is easy to
Should I replace my outdated heating equipment?
Your heating and cooling system is one of the most important investments in your home, especially in regions like Delaware,
Heating
Furnace just shutting off without warning?
Why Is My Furnace Shutting Off Unexpectedly? When your furnace shuts off without warning, it’s more than just annoying—it could
Heating, heating oil
Fuel Ox® Star Plus™ & Worry-Free Winter
At Hillside Oil Heating & Cooling, we believe you should never have to stress about staying warm. That’s why we’re