"Ask Adam" Adam has been in the HVAC industry for over 40 years. He has been involved in all aspects of the business from service to sales. His main interest is in customer comfort. Do Your Lights Dim When Your A/C Starts? This is an interesting phenomenon that affects some homes but fortunately not for most. It is not indicative of a serious problem, but rather more of a nuisance. The most obvious reason for lights dimming is that the A/C consumes a very high start up current and causes a temporary voltage drop. Other circuits within the main panel may be affected by this drop and cause the dimming. The following list are things to check to rule out obvious problems: Make sure A/C breaker is proper size. Make sure wire is proper size. Make sure all connections are tight. Make sure you have 220 volts at A/C breaker. Check amp draw on all motors in A/C circuit. Check capacitor. Adam Kern, Owner Official Heating & Cooling If all of the above check out okay, then we can install a hard start kit which reduces the spike in current draw and eliminates most light dimming. If you have any HVAC questions, call 800-350-HVAC (4822) or email adam@officialhvac.com Bella says: END OF SUMMER WAREHOUSE SALE PRESIDENT AWARD 5 Time Honoree ON ALL IN STOCK EQUIPMENT! A/C UNITS, FURNACES FURNACE A/C COMBO'S INDOOR AIR QUALITY SOLUTIONS FOR SEASONAL ALLERGY SUFFERERS CALL TODAY FOR YOUR FREE ESTIMATE! OFFICIAL Heating & Cooling 800-350-HVAC (4822) BBB officialhvac.com GAZDA INI SALE! NATE FACTORY AUTHORIZED DEALER Carrier " Ask Adam " Adam has been in the HVAC industry for over 40 years . He has been involved in all aspects of the business from service to sales . His main interest is in customer comfort . Do Your Lights Dim When Your A / C Starts ? This is an interesting phenomenon that affects some homes but fortunately not for most . It is not indicative of a serious problem , but rather more of a nuisance . The most obvious reason for lights dimming is that the A / C consumes a very high start up current and causes a temporary voltage drop . Other circuits within the main panel may be affected by this drop and cause the dimming . The following list are things to check to rule out obvious problems : Make sure A / C breaker is proper size . Make sure wire is proper size . Make sure all connections are tight . Make sure you have 220 volts at A / C breaker . Check amp draw on all motors in A / C circuit . Check capacitor . Adam Kern , Owner Official Heating & Cooling If all of the above check out okay , then we can install a hard start kit which reduces the spike in current draw and eliminates most light dimming . If you have any HVAC questions , call 800-350 - HVAC ( 4822 ) or email adam@officialhvac.com Bella says : END OF SUMMER WAREHOUSE SALE PRESIDENT AWARD 5 Time Honoree ON ALL IN STOCK EQUIPMENT ! A / C UNITS , FURNACES FURNACE A / C COMBO'S INDOOR AIR QUALITY SOLUTIONS FOR SEASONAL ALLERGY SUFFERERS CALL TODAY FOR YOUR FREE ESTIMATE ! OFFICIAL Heating & Cooling 800-350 - HVAC ( 4822 ) BBB officialhvac.com GAZDA INI SALE ! NATE FACTORY AUTHORIZED DEALER Carrier