If your heating system is not working properly, it is best to call a professional heating repair technician. Doing so as soon as you notice a problem is recommended, as delaying repairs can lead to more extensive and costly issues. Look for a reputable and licensed HVAC (heating, ventilation, and air conditioning) contractor or technician with experience with your specific heating system. It’s also a good idea to check online reviews or ask for recommendations from friends or family before making a decision. Regular maintenance and servicing by a professional technician can also help prevent issues and prolong the lifespan of your heating system.