TOR shutdown last year April due to a major fault in the regenerative unit situated in the Residue Fluid Catalytic Cracking (RFCC) plant.
According to him, TOR has resumed full operations, contrary to earlier media reports that it was a test run.
The Crude Distillation Unit which will produce petrol and diesel is also back on stream, the source said.
TOR shutdown operations last year April due to a major fault in the regenerative unit situated in the Residue Fluid Catalytic Cracking (RFCC) plant.
As a result, TOR could not process crude.
TOR before the shutdown supplied about 30% of the petroleum products on the market.
The shutdown, the Public Affairs Manager of TOR, Mrs Aba Lokko said, was due to unreliable power supply by the Electricity Company of Ghana (ECG) and failure to carry out maintenance were the cause of the problem.
TOR refines about 45,000 barrels of crude oil per day, a deficit of about 200,000 barrels of national demand.
TOR has over Ghc400 million outstanding debt sitting in its books, according to the Finder newspaper.
The amount is made up of loans for the construction of tanks and an outstanding amount owed GCB Bank, some trade supplies, the Volta River Authority, and the Nigerian National Petroleum Corporation.