Skip navigation

Estimates are free!

24 hour Emergency Service


Northwest Vermont & Northeast New York


Why Won’t My Heat Pump Turn to Heating Mode?


As the temperatures drop, relying on your heat pump to keep your home warm becomes crucial. However, encountering an issue where your heat pump refuses to switch to heating mode can be both frustrating and concerning. In this blog post, we will explore various reasons why your heat pump may not be sending out hot air, with a particular focus on the often-overlooked culprit: the broken reversing valve.

If you run into trouble with your heat pump, you can always call our team for swift and effective heat pump repair in Plattsburgh, NY and the surrounding area.

Broken Reversing Valve

Heating mode for a heat pump relies on a component known as the reversing valve. A broken reversing valve can significantly impact the operation of your heat pump. The reversing valve is responsible for directing the flow of refrigerant, determining whether the heat pump provides heating or cooling. When this valve malfunctions, your heat pump may struggle to switch to heating mode, resulting in the circulation of cold air instead of warmth. Usually, you’ll need to have professionals replace it.

Thermostat Issues

If your heat pump isn’t producing heat, the first thing to check is your thermostat. Incorrect thermostat settings can prevent the system from initiating the heating mode. Ensure that your thermostat is set to the heating mode with the desired temperature. Additionally, malfunctioning thermostat sensors can miscommunicate with the heat pump, preventing it from entering the heating mode.

Refrigerant Levels

Adequate refrigerant levels are crucial for the efficient operation of a heat pump’s heating mode. Low refrigerant levels can hinder the heat transfer process, leading to reduced heating capacity. Similarly, refrigerant leaks not only affect heating, they’ll also affect the cooling ability of the heat pump. Worst of all, a heat pump running on a low refrigerant charge will eventually have its compressor burn out. Don’t wait to have professionals fix this.

Outdoor Unit Problems

The outdoor unit plays a vital role in the heat pump’s operation. Accumulation of debris around the outdoor unit can obstruct airflow, affecting the heat pump’s performance. Additionally, issues with components such as the compressor or fan can prevent the system from producing hot air during the heating mode.

Defrosting System

In our cold climate, a malfunctioning defrosting system can be a common issue. If the system fails to defrost properly, frost or ice buildup on the outdoor unit can hinder the heating process, leading to reduced efficiency and performance.

Electrical Problems

Electrical issues within the heat pump system can disrupt the heating mode. Faulty connections can interrupt the flow of electricity, while malfunctions in capacitors or relays may impede the proper functioning of the heat pump, causing it to produce cold air instead of heat.

System Age

Aging heat pump systems may experience wear and tear, affecting their ability to switch to heating mode. Regular maintenance is essential to address issues proactively, ensuring optimal performance and preventing potential problems that could hinder the heating function.

Red Rock Mechanical, LLC serves Northwest Vermont & Northeast New York. Contact us for heat pump repair or any other HVAC services. 

Comments are closed.