no heat...blower is just fine but unless my rpm is above 2500 no heat. on 2001 Nissan Pathfinder

is it the heating coil and if so do I need 3 remove the dash board?

1 answer 1 comment
ck coolant level to start with,sounds like low coolant level
I ll check that out. just had my radiator replaced this summer so maybe it needs to be topped off. hope its not more problem.