We just bought a house In Rancho Bernardo and come to notice that the heating unit did not turn on when we set it to heat mode on the thermostat. I needed my heater to be checked and serviced. I came here to see if I can find a reliable company to have my heater repaired. I called Comfort Air Zone and I'm glad I did. They came out the next morning at no charged and fixed the heater. It was a loose wire on the thermostat. Diagnoses and repair cost me only $45.00. They were honest, prompt, and very affordable. I had them also check and service both my air conditioning and heating units. Everything checked Ok. Total cost end up being $89.50 including the repairs to my heater. I will highly recommend this Company. When you call ask for Ara, he's the service tech. Very nice young man, knowledgable and honest.