PARSIPPANY, NJ – OCTOBER 28: Danny Bonaduce attends Chiller Theater Expo Winter 2017 at Parsippany Hilton on October 28, 2017 in Parsippany, New Jersey. (Photo by Bobby Bank/Getty Images)

Danny Bonaduce “to feel the love” as he deals with a “mysterious illness”.

Sunday, the “Partridge Family” The star shared a Facebook post written by his sister Celia Bonaduce, which announced that the actor was dealing with a health issue.

“A lot of you have reached out to see what’s going on with my brother Danny,” Celia began. “Thank you. Along with the drenched cones from Dairy Queen and your messages, he’s feeling the love. We’re not being shy when we say this is a ‘mystery disease’…simply put, his balance is crap – super crap – and all of Seattle’s great medical minds are at work to solve this puzzle.”

“We’ll keep you posted,” Celia shared. “Please remember that while he is a public figure, he is also my beloved brother.”

Bonaduce shared a similar sentiment.

“Thank you for all your well wishes,” the former child star tweeted. “It really means a lot to me that so many of you have reached out.”

On Friday, the 62-year-old announced on Twitter that he was taking a temporary leave from his radio show due to his illness. He has appeared on “The Danny Bonaduce & Sarah Morning Show” on Seattle radio station KZOK since 2011.

“News to share. I’m taking temporary medical leave from my radio show,” he tweeted. “I will share more when I know more. I am still working to receive a diagnosis. What I do know is that I need time to focus on my health. I love my job and talking to you about the guys and I’ll be back on the air soon.”

Bonaduce also shared a photo of himself with a cane.

“Charlie Chaplin, Willy Wonka, Danny Bonaduce,” he captioned the snap. “I joined the club of cool guys with canes.”

Bonaduce rose to fame as the wise Danny Partridge in “The Partridge Family,” which aired from 1970 to 1974. The series, which chronicled the humorous adventures of a musical family, starred Shirley Jones, David Cassidy and Susan Dey.

Following the success of the show, Bonaduce struggled with drug addiction. In 1990, he pleaded without contest in Daytona Beach, Florida for attempting to purchase cocaine. He was sentenced to 15 months probation and community service.

Then, in 1991, he was arrested in Phoenix, Arizona, for an investigation into the beating and robbery of a transgender sex worker. At the time, he disputed the account but declined to give further details.

In 2017, he wrote about Cassidy, who died that year at age 67 from alcohol-related organ failure.

“David Cassidy was god to me,” Bonaduce shared in a column for The Hollywood Reporter about his late co-star. “We weren’t close when we did ‘The Partridge Family’ – I was 10, he was 20 – but to me he was like Elvis Presley, right down to the jumpsuit and the arenas full of fans. “

According to Bonaduce, Cassidy contacted him 20 years later and offered to help him when he was struggling with addiction. He explained that Cassidy had invited him to go on tour under the “no drugs, no alcohol, no tobacco and no women” clause. Cassidy insisted things would get better.

“They offered me more money than I had ever seen in my life: $75,000 a year,” Bonaduce recalled. “David told me touring would give me a career, and he did.”

“As far as his own career goes, though, David got robbed,” Bonaduce explained. “When he decided he didn’t want to be Keith Partridge anymore, he left ‘The Partridge Family.’ the show didn’t go that far. It became the theme song to ‘Partridge Family’, it became the David Cassidy sound, with the same thousand fans coming to every show.”

“He never had the life he wanted,” Bonaduce continued. “It was truly a tragedy. I was in Europe when he died, but I heard he was surrounded by his family – Shirley Jones, Shaun Cassidy, Patrick Cassidy. And I heard his last words “So much wasted time.”

The Associated Press contributed to this report. Learn more from FOX News.