A WA funeral arranger says she left a body in her car overnight with the air-conditioner turned up after the hospital morgue deemed it too big to store.

Pilbara Funeral Services co-owner Joanne Cummings said the 200-kilogram body of a man was turned away by Hedland Health Campus staff last Wednesday.

Ms Cummings said she had no choice but to leave the body in her car with the air-conditioning on.

"I actually had to turn around and drive two hours home to Roebourne and keep him in my car overnight," she said.

"I had to have the air-con up full and look after him that way, check on him every half hour, and the following morning we hired a sea container with a chiller unit in it."

The WA Country Health Service said the Hedland Health Campus equipment could only store bodies weighing up to 150 kilograms and could not transfer bodies in caskets.

In a statement, Regional Director Ron Wynn said the service would investigate installing equipment that can take bodies weighing up to 300 kilograms.

"It's imperative that at all times a deceased person is treated with the utmost care and respect and viewings are arranged so as not to cause distress and inconvenience to grieving families," he said.

"We endeavour to do this in all WA Country Service hospitals."

Couple bought heavy lifting equipment after 250kg body

Ms Cummings said a similar situation last year, with a 250kg body, prompted her and her business partner, Gavin Ness, to invest in heavy lifting equipment, which they had been storing at the hospital.

However, she said it was moved into the hospital carpark last week because of an apparent lack of space, so she took it home.

"Over the year the lifting equipment's been slowly pushed out of the hospital, and about the day before this actually occurred last week our lifting device was in the carpark - obviously not wanted - so we took it home, and the following day of course we had this issue," she said.

She said communication could be improved between the hospital and the funeral service.

"Everything's usually fine - we do most things ourselves - it's just the storing of the deceased and anybody who comes to the Hedland Health Service here who's just slightly bigger than average size," she said.