Why it matters to you
Greater Houston air conditioners run through a long, humid cooling season, about 111 days a year at or above 90°F, so dirty coils, clogged condensate drains and weak capacitors tend to surface on the hottest days. JHC Cooling & Heating describes its plan as "$300 annually for a maintenance plan ($175 winter / $175 summer)" and "No trip fee for repairs when you sign up for the maintenance plan for one year"; the plan is for residential customers.
Practical guidance
Between visits, homeowners can safely change air filters, keep the outdoor unit clear of debris and plants, and watch for water near the indoor unit. Leave refrigerant, electrical components, capacitors and gas parts to a licensed technician.