D and L HVAC Troubleshooter

Having trouble with your heating or air conditioning system? Start here.

The D and L HVAC Troubleshooter is a simple, easy-to-use tool designed to help homeowners identify and possibly solve common heating and cooling problems before scheduling a service call.

Answer a few questions about what your HVAC system is doing, and the Troubleshooter will walk you through safe, basic checks you can perform yourself—such as checking your thermostat settings, air filter, circuit breaker, airflow, and other common issues.

The tool can help with problems such as AC not cooling, heat not working, heat pump problems, thermostat issues, poor airflow, unusual system operation, and other common HVAC concerns.

If the problem requires professional diagnosis or repair, the Troubleshooter will let you know when it’s time to contact D and L Mechanical Services.

Save time. Understand the problem. Know when to call a professional.

The HVAC Troubleshooter is intended for basic homeowner troubleshooting only. Never open electrical panels, handle refrigerant components, bypass safety controls, or attempt repairs you are not qualified to perform.

Still having trouble? Call D and L Mechanical Services at (540) 295-6697 for professional HVAC service in Fredericksburg, VA and surrounding areas.