It is a Rexhall, Rexair model.
Judging from the small number of responses here, I assume this is an uncommon problem.
My problem now has become HWH. I have been waiting 5 weeks for a callback from tech service !
I decided to throw some parts at it - now I have been waiting 4 days for a call back from the HWH parts dept !
It appears that HWH has no interest in dealing with me. Customer service keeps telling me they are too busy to return my call!!
Does anyone have a way to get into HWH tech service or the parts dept without going thru Stephanie at the customer service desk ?