Keep your gas appliances in top working order Sign up for a no-cost gas appliance check. We’ll come out to you and inspect your natural gas appliances. We can also perform a gas furnace safety check at no cost to you. Please note: We apologize, but at this time we do not offer customers the ability to schedule services online. Please call our Customer Contact Care Center at 1-800-411-7343 to request service. Hours of operation: Monday - Friday, 7:00 a.m. to 8:00 p.m. and Saturday 7:00 a.m. to 6:00 p.m.