93' Canadian Eurovan CV furnace / aux heater problem

[keefismyname]

I have a 93’ Canadian Eurovan CV full camper which came with the overnight space heater (furnace) for the cabin, fuelled by the petrol gas tank. The controls for it are above the sink. I can get the controls to function and get the green light when I turn it on. I hear relays clicking when I turn the thermostat up and down. The problem is the fan isn’t blowing and nothing heats up. I read there’s a 1.25A fuse but not sure what type it is, would like to know more before I open up the heater to peek around. Any ideas what could be wrong? Thanks!