Heat pumps are growing in popularity across Spokane thanks to their efficiency, but they work differently than furnaces. When your heat pump isn’t heating properly, the cause is often simple. Here’s how to troubleshoot before calling for help.
Check the Thermostat Settings
Make sure your thermostat is set to HEAT and not EMERGENCY HEAT. Emergency heat bypasses the heat pump and runs expensive electric backup strips. Also confirm the temperature setting is above the current room temp. If you recently had a power outage, the thermostat may have reset to factory defaults.
Inspect the Outdoor Unit
Your heat pump’s outdoor unit needs clear airflow. Check for leaves, snow, ice, or debris blocking the coil. In Spokane winters, ice buildup is common. Most heat pumps have an automatic defrost cycle—you may see steam rising from the unit during defrost, which is normal. But if the unit is encased in thick ice, turn it off and call for service.
Check the Air Filter
A dirty filter restricts airflow and forces the heat pump to work harder, reducing heating capacity. This is especially noticeable in colder weather when the system is already working near its limits. Replace the filter and see if performance improves within an hour.
When It’s Just Too Cold
Here’s something many Spokane homeowners don’t realize: air-source heat pumps lose efficiency as outdoor temperatures drop. Below about 25–30°F, most heat pumps need backup heat to keep up. If your system runs constantly during extreme cold but maintains temperature, that’s normal operation—not a malfunction.
Listen for Unusual Sounds
Grinding, squealing, or loud rattling from the outdoor unit can indicate a failing fan motor, loose components, or compressor issues. Turn the system off and call a professional. Continuing to run a heat pump with mechanical problems can turn a minor repair into a major one.
Frequently Asked Questions
Why is my heat pump blowing cold air?
During the defrost cycle, a heat pump temporarily switches to cooling mode to melt ice off the outdoor coil—this can blow cool air for a few minutes. If cold air persists, check that the thermostat isn’t set to COOL, and make sure the outdoor unit isn’t blocked by ice or debris.
Should I cover my heat pump in winter?
No. Covering the outdoor unit restricts airflow and can cause damage. The unit is designed to operate in winter weather. Just keep it clear of snow drifts and debris.
How often does a heat pump need service in Spokane?
Twice a year—once in spring for cooling season and once in fall for heating season. Our long heating season and temperature extremes make regular maintenance especially important for heat pump longevity.
Heat pump struggling to keep up? The Provision crew services all major heat pump brands across Spokane County. Call (509) 999-4775 for honest diagnostics and repairs that last.
