Dun-Rite Heating & Cooling - Knoxville's Professional HVAC Services

This is a common problem we see in Knoxville homes. Often, it's not the thermostat itself but a compatibility or wiring issue with your existing HVAC system, a tripped safety switch, or a low-voltage power problem at the furnace control board. Our technicians can diagnose the root cause, whether it requires a wiring fix, a system reset, or recommending a thermostat better suited for your specific equipment to restore reliable control.

Listen for unusual screeching or grinding noises from your furnace or air handler, weak airflow from your vents, or the system frequently overheating and shutting off. In our climate, a failing blower motor can't distribute warm or cool air effectively, forcing your system to work harder. This spikes your energy bills and can lead to a complete breakdown during a heatwave or cold snap. We recommend calling us at the first sign of trouble to prevent more extensive damage and discomfort.

Absolutely. First, we'll check for simple fixes like a tripped circuit breaker or a blown fuse at the air handler. If power isn't the issue, our expert diagnosis focuses on the control board connections, the continuity of the thermostat wiring, and ensuring the system's safety limits haven't been triggered. We'll pinpoint whether it's a thermostat, wiring, or internal system fault and get your Knoxville home back to a comfortable temperature quickly and correctly.