An investigation by Spotlight revealed several errors in the scheme which will cost the public purse over £400million.
Mr Conor Murphy MLA said the scheme has been flawed from the outset.
He said: "There are huge implications for the civil service and our block grant. Very senior officials had responsibility over the establishment, the monitoring and the implementation of RHI.
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"It beggars belief internal reporting systems were so flawed that key issues were not identified and addressed within the department despite warnings having being raised about the scheme.
"A vast amount of taxpayers' money will be lost, which should be available to the Executive for front line public services at a time of increasing British Tory cuts.
"Given my ministerial experience I do believe that Arlene Foster, who was the Enterprise, Trade and Investment Minister at the time, should come forward to provide a full account and set the public record straight on this issue."
(CD/MH)
