Heating Repair Guide: Keep Your System Running Through a Mount Juliet Winter

Winter in Wilson County can push any heating system to its limit. This guide covers the key maintenance steps, seasonal checks, and smart decisions that help Mount Juliet, TN homeowners stay warm all season. Whether you have a furnace or a heat pump, proactive care reduces your chances of needing emergency heating repair. Call us at (615) 754-7500 to schedule a pre-season tune-up before cold weather sets in.

Why Winter Is Hard on Heating Systems Here

January lows in Mount Juliet average around 27°F, and overnight freezes are common from December through February. When your system runs hard during those stretches, small issues can escalate fast. Catching them early with timely heating repair can mean the difference between a quick fix and a full breakdown.

Middle Tennessee winters also bring high humidity and occasional ice, putting extra stress on heat pumps when outdoor temperatures drop near or below freezing. Knowing which system you have and how it behaves in the cold is the first step toward protecting it.

Your 2026 Pre-Season Maintenance Checklist

Run through these tasks before temperatures consistently drop below 40°F.

Filter Replacement

• Replace standard 1-inch filters every 30 to 60 days during peak heating season.
• Higher-MERV filters help with pets or allergies but restrict airflow faster, so check them more often.
• A dirty filter raises energy use and accelerates component wear.

Thermostat Calibration

• Set the thermostat to heat mode and confirm the system kicks on within a few minutes.
• If your home never reaches the set temperature, the thermostat or its sensor may need recalibration.
• Program a setback of around 65°F overnight rather than letting the system cycle off entirely during freezing nights.

Heat Pump Pre-Season Checks

• Clear leaves and debris from around the outdoor unit.
• Confirm the unit is not sitting in standing water, which can freeze and damage base components.
• Listen for grinding or rattling on startup in heat mode.
• Heat pumps can struggle below about 35°F, so homes in Mount Juliet may benefit from a backup heat strip check.

Gas Furnace Pre-Season Checks

• Note any error codes on the display panel before the season begins.
• Confirm all vents and registers are unblocked by furniture or rugs.
• Inspect the area around the furnace for sulfur or burning odors before heating season.
• Test the carbon monoxide detector near the furnace and replace the battery if needed.

When to Call a Pro Instead of DIY

You can safely replace filters, clear debris from outdoor units, adjust thermostat settings, and test your system early in the season. Call a certified technician for heating repair when you notice any of these:

• The system runs but your home does not reach the set temperature.
• You hear banging, squealing, or rattling from inside the unit.
• Energy bills spike sharply without an obvious cause.
• The heat pump ices over heavily and does not defrost on its own.
• You smell gas or the carbon monoxide detector alarms.

These symptoms often point to refrigerant issues, cracked heat exchangers, or failing electrical components. Our professional heating repair in Mount Juliet, TN can diagnose and fix the problem safely the first time.

How Often Should You Schedule Professional Service?

Most manufacturers recommend a professional tune-up once a year for heating systems. For heat pumps, which run year-round, twice a year is the better choice. Scheduling in early fall means shorter wait times and more flexible scheduling.

Our professional tune-ups typically include checking refrigerant levels, inspecting electrical connections, testing safety controls, lubricating moving parts, and verifying the system meets manufacturer specs. Catching a worn part during a routine visit is almost always less costly than waiting for a failure on a cold January night. Explore our service plans to see how a maintenance agreement can simplify seasonal upkeep.

Quick-Reference Maintenance Checklist

• Replace the air filter every 30 to 60 days.
• Test the thermostat before the first cold snap.
• Clear debris from around the outdoor heat pump unit monthly.
• Check all supply and return vents monthly to confirm they are open and unblocked.
• Test your carbon monoxide detector at the start of heating season.
• Schedule a professional tune-up each fall before temperatures drop below 40°F.
• Call a technician immediately if you notice unusual sounds, smells, or performance drops.

Take Care of Your Heating System Before Winter Takes Over



A little attention in the fall can protect your home through every cold night Wilson County delivers. For the tasks that require a licensed eye, having a trusted team on call makes all the difference. Visit our Google Business Profile to read what other Mount Juliet homeowners say about our work.

Hermitage Heating & Air Conditioning has been serving the community since 1971, providing heating repair and maintenance for furnaces, heat pumps, and more. We offer emergency service seven days a week so you are never left in the cold. Call us at (615) 754-7500 or send us a message to get your system ready for the 2026 heating season.