Knight's Heating & Air Conditioning - Lowell's Certified HVAC Services

Yes, that's a classic symptom of a heat pump reversing valve problem, which is common here in Lowell. This valve is crucial for switching between heating and cooling cycles. Our technicians will first perform a thorough diagnostic to confirm the valve is the issue. Depending on the diagnosis, we can often repair the valve solenoid or, if necessary, replace the entire reversing valve assembly to restore proper heating function to your home.

An air handler fan can fail due to a faulty motor, capacitor, or electrical issue. Since this component is responsible for circulating conditioned air throughout your Lowell home, a failure means you'll have no heating or cooling delivery, making it an urgent repair—especially during extreme temperatures. We'll quickly diagnose the root cause, whether it's a simple capacitor replacement or a more involved motor repair, to get your air flowing again promptly.

First, check your home's circuit breaker and thermostat settings to rule out simple issues. If those are fine, it's time to call us. A complete system shutdown in your Lowell home could stem from several issues, including electrical problems, a failed component like a control board, or safety lockouts. Our technicians are equipped to safely diagnose the problem, provide a clear explanation, and execute the necessary repair to restore comfort to your household efficiently.