Nevets Posted June 22, 2012 Report Share Posted June 22, 2012 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. Quote Link to comment Share on other sites More sharing options...
Bugman1400 Posted June 23, 2012 Report Share Posted June 23, 2012 I have the exact same LAARS LT model. I would switch the system back to pool to ensure you get the same AGS symptom. If so, then remove the front panel of the LAARS and try another restart. The things you are looking for after the exhaust fan blower starts is: 1.) Do you see the glow bar glowing orange down at the bottom? You should see it reflect off the chrome burner pan. 2.) Do you hear the distinct click of the gas valve after the glow bar is orange for a few seonds? If you answer yes to both of these, then gas does not seem to be getting close enough to the glow bar to ignite. Sometimes there are spiderwebs that build up on a few jets and does not allow the gas to flow through that specific jet. Also, it is claimed by some that even though the glow bar glows orange, that it may not be quite hot enough to ignite the gas. Check on #1 and #2 and report back. Quote Link to comment Share on other sites More sharing options...
Pool Clown Posted June 23, 2012 Report Share Posted June 23, 2012 If you are smelling gas, then the HSI is (not glowing/igniting) broken, and the gas valve is opening, meaning all safety switches have been satisfyed. You wont smell gas if the gas valve is not opening and the gas valve wont open till after the HSI is "told" to glow, not glowing, but given the call to glow. Does that make sense? Quote Link to comment Share on other sites More sharing options...
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