Find Thermostat Installation in Diamond Bar, California Give us a few details and we’ll match you with the right pro. Top 10 Thermostat Installation Professionals near Thermostat Installation // California // Diamond Bar Tactical Airflow Rating: Carlos Torres Ac Rating: Cooling & Heating Repair Rating: popularlicensed Titan Air Conditioning Inc. Rating: low_pricelicensed AARD Mechanical Rating: licensed Northstar plumbing, heating and air conditioning Rating: popularlicensed Twin’s Heating & Air service repair Rating: Michael Wolfe Rating: low_pricelicensed Heating and Cooling Repair Rating: MSP Heating and Air Rating: licensed