I had the same problem and had to buy and replace a new heater. I got the part from ebay, cost 45.00 but it was a nightmare to replace, it took me 2 days as you have to strip the whole machine down to get into it. I would advise you to get someone else to do it. Mine was working fine but now the on/off switch is away on it but this looks simple to replace.
Agnes
May 2007