Kosol Wangwan, the father of the husky-voiced former lead singer of The Ovation, a popular band in the 1980s, said that Patchara was always cheerful despite having gone through her parents' divorce.
The former Roi Et MP said he did not think that suicide was the cause of his daughter's death. The family is arranging for her body to be brought back home, he added.
Her mother, Srisudarat Karnjanarak, said she was shocked after she learned of the tragedy and initially thought that her daughter had been killed in an accident.
However, the Thai Consulate in Los Angeles later confirmed the police report that the former pop singer had been found hanged inside her garage in Riverside, near Los Angeles.
Mrs Srisudarat said that Patchara, nicknamed "Ae", was the one financially supporting the family and they normally talked on the phone twice a week.
"She was the main pillar of the family," she said.
Patchara, who worked in the United States as a helper to elderly people, a teacher and a part-time singer, was about to finish nursing school in December, according to her mother.
Patchara, 48, found dead inside her home in Riverside near Los Angeles on Wednesday. Earlier reports said she had died in a road accident but it was later confirmed that it was a suicide.
Prasittiporn Wetprasit, deputy director-general of the Consular Affairs Department said the consulate would ask the Los Angeles Police Department for the autopsy report in order to clarify the cause of death.
Patchara was with The Ovation since its debut album, "Love and Miss You" in 1982 and left the band after its fifth album "Endless Love" in 1986. She later pursued her career as a solo artist before leaving for the United States.
Padung Wangwan, the singer's older brother, said his sister had lived in the US for more than 10 years and rarely returned to Thailand.
"She was the pillar of our family and sent about 20,000 baht to her family every single month," he said.