Let me start off by saying I am a newbie someone gave me a great lakes spa. It has 5 places to sit and one spot to laydown. I can see one pump its a Flow Master HP but have not looked for the second I get a flow messege on digital read out the light comes on for everything on display except the heater. The blower works and on seat has jets working the filter has no suction in it or is it suppose to? The heater I dont believe works it will come on for a few seconds at a time or I think its the heater I heard this when I turned both jets off and the blower off. Where do I need to start?

Thanks Chris