Nevets

Ok a little back story. Heated the spa about 2 weeks ago. Everything worked fine and the spa heated nicely. Then last weekend put the filter pump on and the pool heater and left to do some things. When i got back home the pool wasnt warm. Go to the heater and the service AGS light is on. Turn it off to try again. Runs about 3 times and then service AGS light comes on again. I can smell gas when it comes on and starts blowing air through the vent so i know its getting gas. So i switch to spa and see if that will heat. But instead of service AGS light coming on, I'm getting the pressure switch light flashing and the heater wont kick on. Anybody have ideas? I want to try and do this myself because I can't really afford to have a technician do it. Ive done some searching but because i dont know what's what I'm not really sure what im suppose to be checking. Here's some pictures of my setup for reference and maybe you can tell me what i should check and where it is in the pictures.