On Thursday, Mr Banharn welcomed caretaker Prime Minister Yingluck Shinawatra to his home province of Suphan Buri.
"I feel for Ms Yingluck, who's facing a crisis at this time and I don't think there's a way out for the country," the 82-year-old politician and former premier told reporters.
Asked for the solution to the country's crisis, he replied, "Go ask the Constitutional Court."
The charter court has given Ms Yingluck 15 days to defend a cabinet decision to remove Thawil Pliensri from the position of National Security Council (NSC) secretary-general. The future of her tenure as caretaker prime minister, and of her cabinet, hangs on the court's decision.
The 15-day timeline was set after the nine judges unanimously accepted for consideration a petition filed by 28 senators who argue that Ms Yingluck's order for the removal of Mr Thawil on Sept 30, 2011 was a violation of sections 182 (7) and 268 of the constitution.
The Supreme Administrative Court earlier ruled that Mr Thawil's removal was unjustified and ordered his reinstatement.