Utility regulators are scheduled to interrogate the new president of Arizona Public Service Wednesday as the state's largest electrical utility faces scrutiny for billing mistakes and political spending.
APS chief executive Jeff Guldner is likely to be grilled by the Arizona Corporation Commission about an online tool that was supposed to tell customers about their cheapest power plan but instead steered about 12,000 people to higher-cost options.
The company has taken the faulty tool offline, promised to fix it and has promised to issue refunds.
