How to Fix a Heater That Won’t Heat |Furnace & Heat Pump Repair

Dealing with a heater that won’t warm your home can be frustrating and inconvenient, especially during cold weather. Whether you rely on a furnace or a heat pump to keep your home warm, understanding the common causes of heating issues is the first step to restoring comfort.

In this guide by Air Control Services, you will learn actionable steps to fix a heater that won’t heat. If you’re ini Las Cruces, NM, contact our heating pros for proper troubleshooting. Call (575) 636-2754 for a free estimate.

Let’s get started.

Ensure the thermostat is set to “Heat” mode and the temperature is higher than the current room temperature. If the thermostat runs on batteries, replace them to rule out power issues.

Dirty or clogged air filters can restrict airflow, causing the furnace to overheat and shut down. Replace the filter if it appears dusty or hasn’t been changed in the last few months.

If you have an electric furnace, check the circuit breaker panel for a tripped breaker or blown fuse. Reset the breaker or replace the fuse to restore power. 

Electric furnaces may also have an internal safety switch or reset button, which is generally located near the blower motor or on the side of the furnace housing. Consult your furnace’s manual for the exact location, and press the reset button if it has tripped. 

For older gas furnaces with pilot lights, ensure the light is on and relight it if necessary. The thermocouple might need adjustment or replacement if the pilot doesn’t stay lit.

For modern gas furnaces with electronic ignition, check for error codes on the furnace display and consult the manual for reset instructions.

If the blower motor isn’t running, inspect for obstructions or damage. Electric furnaces may rely solely on the blower to circulate warm air, while gas furnaces use it to distribute heat from combustion. If it’s unresponsive, professional repair or replacement might be required.

Ensure your thermostat is set to “Heat” mode and the temperature is set above the current room temperature. If your heat pump has auxiliary or emergency heat settings, verify it functions properly.

Confirm that the heat pump is receiving power by checking the circuit breaker or fuse box for any tripped breakers or blown fuses. Reset or replace them as needed to restore power.

Debris or ice buildup on the outdoor condenser unit can reduce the heat pump’s efficiency. Clear leaves, dirt, or snow from the unit, and clean the coils. If ice buildup persists, the defrost cycle may not work, and professional service may be required.

The reversing valve controls the heat pump’s ability to switch between heating and cooling. If it’s malfunctioning, the unit may blow cool air instead of warm. This is a technical repair that requires a professional HVAC technician.

Low refrigerant can prevent the heat pump from transferring heat effectively. A licensed technician can test and recharge refrigerant levels if needed, as handling refrigerant requires specialized equipment and certification.

Some heating issues require expertise beyond basic troubleshooting. Call a professional HVAC technician if:

• You notice persistent problems: Issues like frequent shutdowns, strange noises, or inconsistent heating might indicate underlying mechanical or electrical failures.
• DIY fixes don’t work: If your attempts to clean filters, reset breakers, or inspect components don’t resolve the problem, a deeper diagnostic is necessary.
• There’s a gas or electrical concern: For safety reasons, gas supply interruptions, electrical faults, or complex component failures like blower motors and reversing valves should always be handled by a licensed technician.

A heater that won’t heat disrupts your home’s comfort and safety. When DIY fixes fall short, trust Air Control Services in Las Cruces, NM, for professional heater inspections and repairs. From intricate furnace repairs to precise heat pump troubleshooting, our experienced technicians provide tailored solutions to restore warmth and efficiency.

Call ((575) 636-2754 to schedule heater service for your furnace and heat pump. We’re available 24/7 to bring your heating system back to optimal performance.