Thanks everyone.it is an lp gas we get intermittent hot water but there is no in floor heat it is in for service with compass warranty at first glance the tech said it has a blue colored antifreeze which is not the manufacturer type which may void my warranty..I'm told parts are hard to find due to it being a 375 as 400 seem to be more common so I'm trying to determine a replacement with an upgrade to a 400lp so going forward parts are available or do I switch it over to a diesel model as I read lp is being phases out ..I only own this 8 months and hope to have it for years to come ..any suggestions appreciated