Premier Kathleen Wynne says the province will work with the Ombudsman to get any information he needs, noting Hydro One is in a "transition" when it comes with billing. Wynne says that means Hydro One is in the process of dealing with problems in the system.
The comments come after Andre Marin announced a probe into Hydro One's customer service and billing practices.
In a statement, Hydro One president and CEO Carmine Marcello said they will work "openly and constructively" with Marin. Marcello notes Hydro One has had "challenges" putting in place it's new billing system last May and are taking "aggressive steps" to correct the issue.
Both the NDP and Tories at Queen's Park say they aren't surprised to hear of Hydro One over-billing customers.
NDP leader Andrea Horwath says she's been pushing the Ombudsman to look into the matter since 2010, pointing to residents who have reached out to her.
Progressive Conservative finance critic Vic Fedeli says his North Bay office has helped residents contact the utility provider and can vouch for questionable customer service.