A woman who died at her home in Banks Road, Crawley, on New Year's Eve has been identified as 51-year-old Maria Woodhead.
Forensic investigators have now established that there was not an explosion as first thought, but that a small fire, contained within one room at the house, may have contributed to Miss Woodhead's death.
However, the exact cause of her death has not yet been established, but it is not being treated as suspicious.
The matter has been referred to the coroner's officer and investigations are continuing.
Police were called at 12.30pm today to Banks Road in Crawley after an explosion at a house. A woman in her 50s died at the scene following the explosion which is suspected to have been caused by a faulty boiler or gas unit.
Police were called at 12.30pm on December 31 to Banks Road in Crawley to an explosion at a house. Emergency services are at the scene.
It is unclear at this stage what caused the explosion but it is not believed to be suspicious.
Damage is confined to the interior of the house and no other premises are affected.
A woman in her 50s was taken from the house, treated by paramedics but has sadly died at the scene shortly afterwards.
There is not believed to have been anyone else in the house.
Drivers are being asked to avoid the area as there are some road closures while the scene is examined.
A woman has died at a house in Crawley, West Sussex Fire and Rescue have confirmed.
Police were called at 12.36pm this afternoon to Banks Road in Pound Hill.
Emergency services are currently at the scene.