Nalk Knows: heating and cooling guides
Find practical guidance on service requests, maintenance, installation options, and questions to ask before you approve HVAC work.
Browse the guides
Cooling and hot-weather help
- Is your AC running properly? Checks to share with a technician
- AC repair before the change to heating season
- Request AC repair near Fresno and Clovis
- Home habits that support your AC during hot weather
- Why does your AC smell musty?
- Find current Fresno County cooling-center information
- Keeping your home cooler during extreme heat
Heating and system options
- Switching from hot afternoons to cooler evenings
- Choosing a heater repair company in Fresno
- Heat pump installation in Fresno and the Central Valley
- Why is your furnace not heating the house?
- Five reasons to have a heater checked
- What a heating repair visit costs in Fresno
- HVAC options for a new or recently purchased home
- Rooftop AC Package Unit Replacement in Fresno
- When to discuss HVAC repair or replacement
Maintenance and indoor air
Choosing a contractor
Use the right source for your question
These guides provide general information and Nalk’s service process. They cannot diagnose your equipment. Follow the manufacturer’s instructions and use a qualified technician for electrical, gas, and refrigerant work. Use current official heat resources for cooling-center availability and medical emergency guidance.
Request help with your system
A repair diagnosis has a visit charge. Read what a repair visit costs for the first-hour charge, additional time, parts, after-hours rates, and travel charges. The technician explains repair options and costs before you approve repair work.
Installation and replacement estimates are free. Already have a repair, installation, or replacement quote from another company? Ask about our free second quote. A request becomes an appointment when the office confirms the date and time.
