John Stevenson Plumbing, Heating &; Air is a family-owned, full-service plumbing, heating, ventilation, and air conditioning company dedicated to serving the needs of North San Diego County residents. Since 1990, our friends and neighbors have trusted us to keep their homes comfortable and safe year-round. Since opening in 1990, we’ve taken on the challenges of interior maintenance, from drain cleaning to water heater repair to HVAC services and everything in between. We employ only the most qualified professionals and provide ongoing advanced technical training so you can benefit from the highest level of service in the industry. We have the knowledge and experience to solve any plumbing, drainage, or HVAC problem with the best materials and fair entry-level prices.