Heat Pump Maintenance in St. Louis — Keep Your System Running at Peak Efficiency
A heat pump works year-round which means it takes twice the wear of a single-season system. Regular maintenance keeps it running efficiently, extends its lifespan, and catches small problems before they become expensive ones.
What's Included in a Heat Pump Tune-Up
Most HVAC companies describe a "system check" without listing what's actually done. Here's exactly what our technicians cover on every heat pump maintenance visit.
🧹 Coil Cleaning
We clean both the indoor evaporator and outdoor condenser coil. Dirty coils reduce heat transfer and force the system to work harder, raising energy bills and accelerating wear.
💧 Refrigerant Level Check
We verify refrigerant charge and inspect for leaks. Low refrigerant causes the system to run longer without reaching set temperature and can damage the compressor over time.
🚿 Condensate Drain Cleaning
We clear the condensate drain line to prevent water backup, mold growth, and water damage, a common issue in St. Louis' humid summers.
🔄 Reversing Valve Test
We test the reversing valve, which switches the heat pump between heating and cooling modes to confirm it is operating correctly in both positions.
❄️ Defrost Cycle Test
We verify the defrost cycle operates correctly to prevent ice buildup on the outdoor unit during cold weather.
⚡ Electrical Connections
We inspect and tighten all electrical connections, check wiring insulation, and test voltage at key components. Loose connections are a leading cause of premature component failure.
🌬️ Air Filter Inspection
We inspect the filter and replace it if needed. A clogged filter restricts airflow, increases energy consumption, and can trigger short cycling.
🌡️ Thermostat Calibration
We verify thermostat accuracy and confirm proper communication between the thermostat and the heat pump. A miscalibrated thermostat costs money every day it goes uncorrected.
💨 Blower Motor & Fan Inspection
We inspect the indoor blower motor and outdoor fan for wear, unusual vibration, and proper RPM.
🔋 Capacitor & Contactor Check
We test high-wear electrical components that fail without warning, like capacitors and contactors. Catching a weak capacitor on a maintenance visit costs less than an emergency call.
How Often Does Your Heat Pump Need Maintenance?
1. Cooling System Check
Check coils, refrigerant, condensate drain, and cooling-mode components before St. Louis summer heat arrives. Best booked in April–May.
2. Heating System Check
Verify reversing valve, defrost cycle, auxiliary heat, and heating-mode components before temperatures drop. Best booked in September–October.
The best time to book a cooling system check is before peak summer demand, when schedules are still open. If you wait until your system is struggling in July, you may be competing with emergency calls. Preferred Partner Plan members get priority scheduling, and we fit them in before the general queue fills.
Signs Your Heat Pump Needs Service Now
These symptoms mean you need a service visit, not just a scheduled maintenance. If any of these apply, call us or visit our emergency page.
Short cycling: the system turns on and off frequently without completing a full run cycle
Blowing warm air in cooling mode or cold air in heating mode
Not reaching set temperature: runs constantly but you cannot get your home to the thermostat setting
Ice buildup on the outdoor unit outside of normal, brief defrost cycles
Unusual noises: grinding, banging, screeching, or rattling
Noticeably higher energy bills without a change in usage or weather
Need service right now?
If your heat pump has stopped working or your home isn't at a safe temperature, that's an emergency, not a maintenance issue. We're available 24/7.
The Air Comfort Service Preferred Partner Plan
The Preferred Partner Plan is Air Comfort Service's maintenance agreement. This is the simplest way to make sure your heat pump gets serviced every year without having to remember to schedule it. Only $19/month for all of these amazing benefits!
| Benefit | Details |
|---|---|
| Two system checks per year | One cooling system check + one heating system check x2 |
| Priority scheduling | You go to the front of the line for all service and repair appointments |
| 50% off after-hours fees | Standard after-hours emergency fees cut in half for all PPP members |
| Repair & parts discounts | Members receive discounts on parts and labor for covered repairs |
| Peace of mind | Your system is checked twice a year, not just when something breaks |
| Benefit | Details |
|---|---|
| Two system checks per year | One cooling system check + one heating system check x2 |
| Priority scheduling | You go to the front of the line for all service and repair appointments |
| 50% off after-hours fees | Standard after-hours emergency fees cut in half for all PPP members |
| Repair & parts discounts | Members receive discounts on parts and labor for covered repairs |
| Peace of mind | Your system is checked twice a year, not just when something breaks |
Heat Pump Maintenance vs. Emergency Repair
Maintenance — Scheduled & Preventive
Booked weeks or months ahead/planned
Goal is to prevent breakdowns before they happen
Catches failure-prone parts while they're still inexpensive to fix
Performed at normal business rates
Builds documented system history for faster future diagnosis
Emergency Repair — Reactive
Unplanned/triggered by a breakdown or failure
Often involves after-hours fees and schedule urgency
More stressful; may involve temporary equipment downtime
Higher cost, especially for compressor or major component failures
PPP members get 50% off after-hours fees
If you're unsure whether what you're experiencing is a maintenance issue or an emergency, call (314) 819-0028 and our team can help you over the phone.
Heat Pump Maintenance Across the St. Louis Metro
Chesterfield
Ballwin
Kirkwood
Webster Groves
Creve Coeur
Ladue
Florissant
Hazelwood
Lake St. Louis
Dardenne Prairie
Mehlville
Oakville
Cottleville
O'Fallon
St. Peters
Wentzville
Lake St. Louis
Dardenne Prairie
Mehlville
Oakville
Cottleville
O'Fallon
St. Peters
Wentzville
Not sure if we cover your area? Click here to see our entire service area page.
FAQ
A: Most maintenance checks take 60–90 minutes. If the technician identifies additional issues that need attention, they'll let you know and provide a quote before doing any extra work.
A: Standard heat pump maintenance with Air Comfort Service costs $99 per visit. Preferred Partner Plan members for $19/month receive both annual tune-ups as part of their membership, effectively covering the cost of the plan in maintenance visits alone, before accounting for the other member benefits like priority scheduling and after-hours discounts.
A: Twice a year. Once before the cooling season and once before the heating season. Because a heat pump operates year-round, it benefits from maintenance at both seasonal transitions. Preferred Partner Plan members at $19/month have both visits included and get scheduled before the general queue fills up.
A: Yes, and the case is stronger for heat pumps than for single-season equipment. A heat pump runs in both heating and cooling mode, which means it accumulates wear year-round. Without regular maintenance, small issues go undetected until they cause a breakdown. A $99 system check that catches a failing capacitor before summer is far less expensive than an after-hours emergency call to replace it in July.