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4.8K views 2 years ago. My pool heater would not fire and was showing the LO (low flow) code. This shows where the adjustment knob is on the pressure switch and insight into …While all Hayward H-Series heaters are energy-efficient, the Universal H-Series 200 Low NOx natural gas heater has an 83-84 percent leading thermal efficiency. Cart. ... Hayward Universal H Series Low NOx 200,000 BTU Natural Gas Swimming Pool Heater SKU: W3H200FDN. 4.8 See Reviews (4)Hayward Pool Product Registration. Register your Hayward equipment now to receive a 90 day extended warranty, expert advice, rebate offers & more!*. June 30, 2023 NOTICE: Any applicable warranty coverage for a product shall not commence prior to the delivery date of that product notwithstanding anything stated elsewhere to the contrary.THanks for your help and advice I have an older H400 Hayward Pool heater that is struggling to heat the water . Mostly it is working but keeps going off on "LO" . BUt after a time it seems to cool and … read moreHayward H250 Quick Manual (4 pages) Universal H-Series POOL AND SPA HEATERS. Brand: Hayward | Category: Swimming Pool Heater | Size: 0.8 MB. Hayward H250 Pdf User Manuals. View online or download Hayward H250 Installation, Operation & Service Procedures, Installation, Operation And Service Manual, Quick Manual.Pentair 42002-0024S Pool Heater Pressure Switch: This pressure switch is specifically designed for Pentair pool heaters, but can also be used in other pool heaters that require a 2 PSI switch. Len Gordon 800120-1 Pressure Switch : This pressure switch is a direct replacement for Len Gordon pressure switches and is compatible with most pool heaters.Hayward Pool Products Inc. is a leading manufacturer and distributor of swimming pool equipment and supplies. With over 80 years of experience, the company has been at the forefron...Hayward Universal H-Series Low NOx Induced Draft Pool & Spa Heater | 200,000 BTU | Natural Gas | W3H200FDN. The Hayward Universal H-Series gas heater is the "universal" energy efficient remedy for any new or existing pool or spa. An industry leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when ...Exiting Bypass Operation. To exit bypass operation and resolve the bO Code problem, follow these steps: First, set the heater to standby mode. Next, press and hold the Down key and MODE key for three seconds. Finally, verify that the display no longer shows the "bO" indication.Apr 21, 2009 · I recently bought a house with a in ground pool/hot tub combo that includes a Hayward H400 pool heater. It was a bank owned house where the pool had been sitting without filtering for probably 6 months. After getting everything cleaned up, having the system gone through, I fired it up and the... How can you reset your Hayward Pool Heater? To reset your Hayward pool heater, first, select the ‘MODE’ button from the keypad. Then keep cycling between ‘STANDBY’ and ‘MODE’. Your heater will reset. Why does my Hayward Pool Heater keep shutting off? Your Hayward pool heater cycles on and off mainly due to overheating.Follow these steps for a safe power down: Turn Off Power: Locate the power source and switch off the power supply to the heater. This step ensures safety during the disconnection process. Unplug and Label: Unplug all electrical connections from the heater, including power cords and control panels.The Hayward H-Series' Finn Plate cupro-nickel heat exchanger has special V-groove design for faster heating and longer life. Hayward Universal H-Series, Low NOx, 250,000 BTU, Propane Gas, Pool and Spa Heater delivers energy efficient heating to your pool's water that you can trust. Hayward Universal H-Series - Versatility & PowerProduct Description. Universal H-Series 250, 000 BTU Pool and Spa Heater, Natural Gas, Low Nox. From the Manufacturer. The Hayward Universal H-Series gas heater is the "universal" energy efficient remedy for any new or existing pool or spa.However, in a gas heater, the exchanger can begin to cavitate and make a loud banging noise. In my experience, about 1/3 of pool heater service calls are actually due to water flow issues. Knowing …The Universal H-Series Low NOx 150,000 BTU Natural gas heater, is environmentally friendly and complies with all current air quality emission standards. Read more. Ships within 1-3 business days. Free shipping. In Stock. $2,409.00. Qty: Add to Cart. Buy in monthly payments with Affirm on orders over $50.Hayward Propane Pool Heater 400K BTU H400FDP The Universal H-Series Heater is the world-class heater with an Earth-friendly conscience. While all Hayward H-Series heaters are energy-efficient, the Universal H-Series Low NOx heater has an 83-84 percent industry-leading thermal efficiency and complies with all current California and Texas air...

Available in 150,000, 200,000, 250, 000, and 400,000 BTUs, the Universal H-Series heater can raise the temperature of an 800-gallon pool 30 degrees in less than an hour—you’ll feel the benefits the moment you step into the water. The Hayward Universal H-Series Low NOx can be added to inground pool kits sold by Pool Warehouse!Heater must then be in Spa or Pool Mode for operation. The heater will fire when instructed by the external control. Control Configuration- Two wire Note: 104° maximum temperature. Step 1: Step 2: Step 3: Press the Mode button to place the heater in Standby Mode. Hold the Down Arrow and Mode buttons simultaneously for 3 secondsBuy a Hayward W3H250FDP Universal H-Series H250 Low NOx Pool Heater, 250,000 BTU, Propane Gas at The Pool Supplies Superstore. FREE Shipping. Guaranteed Lowest Price.My Hayward Hseries pool heater shows a LO and stops working HI My Hayward Hseries pool heater shows a LO and stops working when it rains. My temp dropped from 92 to 80.All HAYWARD Pool Heaters can be shipped to you at home. What are some of the most reviewed products in HAYWARD Pool Heaters? Some of the most reviewed products in HAYWARD Pool Heaters are the HAYWARD Universal H-Series Propane Gas 150,000 BTU Low NOx Pool Heater with 5 reviews, and the HAYWARD Universal H-Series Natural Gas 400,000 BTU Low NOx ...

The 150,000 btu/hr heater requires a minimum of 20 gpm. You can try to adjust the pressure switch as described in the manual. In my opinion, a flow switch will be the best solution. The Hayward aquarite flow switch turns on at 15 gpm and off at 12 gpm. It would work but I think that the flow is too low.If your Hayward pool heater is displaying the LO code, it means that the limit string is open and the heater will shut down and enter lockout mode. To fix the problem and close the limit string, you’ll need to wait 2 minutes for the automatic restart.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Top-access design eliminates the need to remove side panels and knee. Possible cause: 42002-0024S Stack Flue Sensor Replacement for Pentair Sta-Rite Mastertemp. $15.88.