Common signs that your heating system may require repair or maintenance include:

1. Uneven or insufficient heating in your home
2. Unusual noises coming from the furnace, boiler, or heat pump
3. Frequent cycling on and off of the heating system
4. Noticeable increase in energy bills without a change in usage patterns
5. The presence of a persistent, unpleasant odor when the heating system is in use

If you notice any of these signs, it's essential to schedule a service appointment with a professional technician to diagnose and resolve any issues.

There are several ways to improve the energy efficiency of your heating system:

1. Schedule regular maintenance to ensure your system is running optimally and address any potential issues.
2. Replace old, inefficient equipment with newer, energy-efficient models that consume less energy and provide better heating performance.
3. Insulate your home properly, including sealing any gaps or cracks, to reduce heat loss and maintain a consistent indoor temperature.
4. Install a programmable thermostat to better regulate your home's temperature, reducing energy consumption when heating is not required.
5. Keep air vents and filters clean to maintain proper airflow and reduce the strain on your heating system.

By implementing these energy-saving measures, you can reduce your energy bills and create a more comfortable living environment.