Johnson Heating | Cooling | Plumbing. is the expert team Central Indiana homeowners and business owners alike have trusted with Plumbing, HVAC and AC Repair for nearly 50 years! Johnson Heating | Cooling | Plumbing. is the expert team Central Indiana homeowners and business owners alike have trusted with Plumbing, HVAC and AC Repair for nearly 50 years! Johnson Heating | Cooling | Plumbing. is the expert team Central Indiana homeowners and business owners alike have trusted with Plumbing, HVAC and AC Repair for nearly 50 years!