Just to answer a couple of things about my "problem"
I DO have a heat pump! It is on the roof.I also have the gas furnace in the basement.
When the outside temp is well above 40,and I have the wall Tstat set to "Electric Heat" The rooftop unit should come on and heat the trailer thru the ceiling air outlets.It used to work fine.It no longer does.It does what it should to do,if the HP can not supply heat,it will automaticly switch over to "Gas mode" and supply heat, thru the floor vents, from the gas furnace in the basement.
That's the "problem"...no heat from the rooftop HP.
I can switch over to "Cool" and the HP works just fine.
I can switch to "Gas mode "and the basement furnace heats the trailer with no problem.
There Are NO heat strips in the HP unit.
It seems as though the HP is not reversing to heat mode.
I realize that I can do without the HP heat and just use gas,but sometimes free electric over using my propane is the better deal.
I have a tech comming tomorrow,I'll post whatever he finds.
Thanks again for all the suggestions and advice
Ed