![Pool Supply Unlimited | Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Propane | W3H400FDP Parts Pool Supply Unlimited | Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Propane | W3H400FDP Parts](https://www.poolsupplyunlimited.com/Products/MediumSchematic/44599_0_2018824124033.jpg)
Pool Supply Unlimited | Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 400,000 BTU | Propane | W3H400FDP Parts
![Amazon.com : Bezel and Keypad Assembly Replacement Kit FDXLBKP1930 Compatible with Hayward Universal H-Series Low NOX Pool Heater Fits Models H150FDN,H300FDN : Patio, Lawn & Garden Amazon.com : Bezel and Keypad Assembly Replacement Kit FDXLBKP1930 Compatible with Hayward Universal H-Series Low NOX Pool Heater Fits Models H150FDN,H300FDN : Patio, Lawn & Garden](https://m.media-amazon.com/images/I/71SCLKLxtwL.jpg)
Amazon.com : Bezel and Keypad Assembly Replacement Kit FDXLBKP1930 Compatible with Hayward Universal H-Series Low NOX Pool Heater Fits Models H150FDN,H300FDN : Patio, Lawn & Garden
![Please help fix my pool heater (error code: LO 'limit string open error') (Brand: HAYWARD) (Model#: H350FDN) (Serial#: 21132105109690001) I have a video here showing the general problem. I will try and Please help fix my pool heater (error code: LO 'limit string open error') (Brand: HAYWARD) (Model#: H350FDN) (Serial#: 21132105109690001) I have a video here showing the general problem. I will try and](https://external-preview.redd.it/6IH-fEliSto9PNwkpcLXRsbCOXgqXL_9IoQ_ORQML5E.png?format=pjpg&auto=webp&s=6ac34fdbd4d6fa6ccf5cf82d77e724dc155d7df4)