I have a Raypak P-R335BL heater. Whenever we heat the spa, at about 94F, it trips off with HL1 & HL2 error messages. Pressure is about 9psi. So far tech has changed blower fan, both HL1 & HL2 limit switches, and a Bypass valve. Last time the tech just bypassed the bypass valve completely. It keeps tripping off at 94 or so, and then will turn back on, go to 95 or 96, then trip again, and will finally make its way to 100F. Down almost 0 or so, hate putting more money into this unit. We bought this house 1 year ago, but I think the heater is about 7 years old. Tech was on the phone with Raypak for over 1 hour. HELP please.
Oh yes, pool water chemistry is fine. Had pool store check the water and everything was ok.
Hi NMexican, thanks for your reply. FIlters are clean. I will ask him to check gas pressure. We know what the error codes mean, just don't know why they keep popping up. Will change out thermostat next, unless someone has other suggestions. Thanks.