Why won’t my hot tub heater work? should it be set on f2 f4 f6 f8 fc? ?
F followed by any number of course refers t the filter cycle. Your heater should run no matter what cycle it is in. The heater has to have flow of water to run of course. So it is either a faulty pressure switch or “Flow switch”(most likely). If not that then you need to test the resistence of the heater (7.2-14.1) depending on if it’s a 4kw to 5.5kw heater. If that is ok I hate to tell you it is your circuit board.
It would be nice to know what brand and model of tub you have.
Hot tub
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Genuine Unicel Hot Tub Filter C-4326 C 4625 Filbur FC 2370 Pleatco PRB25 Rainbow $19.66 |
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Genuine Unicel Hot Tub Filter C 4950 C4950 FC 2390 PRB50 – 50 sq ft Spa Filter $29.49 |
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Fits R173435 Dynamic Series PRB75 Pool Spa Hot Tub Filter FC-2395 C-4975 C4975 $31.99 |
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5 PACK Fits R173435 Dynamic Series PRB75 Spa Hot Tub Filter FC-2395 C-4975 C4975 $143.99 |
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5 PACK Fits R173435 PRB75-M MICROBAN Spa Hot Tub Filter FC-2395M C-4975 C4975 $189.99 |
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Fits Dynamic Series PRB75-M MICROBAN Spa Hot Tub Filter FC-2395M C-4975 C4975 $42.99 |
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2 PACK Fits Dream Maker Spa Hot Tub Cartridge Filter PDM25P4 4CH-21 FC-0136 $37.99 |
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6 PACK Fits Dream Maker Spa Hot Tub Cartridge Filter PDM25P4 4CH-21 FC-0136 $91.99 |
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Fits Dream Maker Spa Hot Tub Cartridge Filter PDM25P4 4CH-21 FC-0136 $21.49 |
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Fits Dream Maker Spa Hot Tub Cartridge Filter PDM25P4-M MICROBAN 4CH-21 FC-0136 $26.99 |
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2 PACK Fits Dream Maker Spa Hot Tub Filter PDM25P4-M MICROBAN 4CH-21 FC-0136 $47.99 |
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6 PACK Fits Dream Maker Spa Hot Tub Filter PDM25P4-M MICROBAN 4CH-21 FC-0136 $131.99 |
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Hot Tub Filter ANTI-MICROBIAL PRB50 IN C4950 FC2390 Spa $41.95 |
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4CH-35 FC-0161 Unicel/Filbur Spa Hot Tub Filter $23.00 |
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7CH-502 Unicel Spa Hot Tub Filter $26.50 |
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4CH-20 FC-0125 Unicel/Filbur Spa Hot Tub Filter $20.50 |
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Fits Comfort Line Spa/Duroc Top Load Spa Hot Tub Filter Cartridge PH3-4 FC-3111 $13.99 |
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2 PACK Fits Comfort Line Spa/Duroc Spa Hot Tub Filter Cartridge PH3-4 FC-3111 $20.99 |
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NEW Super Pro Hot Tub Replacement Cartridge – Watkins Hot Spring Spa – FC-3915 $23.99 |
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Pleatco PRB35-IN-M MICROBAN Spa Hot Tub Replacement Filter C-4335 C4335 FC-2385 $23.99 |
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2 PACK Pleatco PRB35-IN-M MICROBAN Spa Hot Tub Filter C-4335 C4335 FC-2385 $46.99 |
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6 PACK Pleatco PRB35-IN-M MICROBAN Spa Hot Tub Filter C-4335 C4335 FC-2385 $129.99 |
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Pleatco PSD125 Fits Sundance 120 Spa Hot Tub Filter FC-2750 C-8320 C8320 $59.99 |
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Rainbow Dynamic spa filter cartridge hot tub 25 35 50 $35.99 |
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Rainbow Dynamic spa filter cartridge hot tub 25 35 50 $35.99 |
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Rainbow Dynamic spa filter cartridge hot tub 25 35 50 $35.99 |
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6 PACK Pleatco PRB50-IN-M MICROBIAL Spa Hot Tub Filter C4950 C-4950 FC-2390 $139.99 |
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Pleatco PIC50N Spa Filter Cartridge fits Icon & Keys Hot Tub FC-1084 C-4351 $27.95 |
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Pleatco PSN50P Spa Filter Cartridge fits Sunrise Hot Tub Replaces FC-0530 7CH-32 $34.95 |
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(2) DreamMaker Spa Filters Dream Maker Hot Tub FC-0136 $39.94 |
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(2) Hot Tub Spa Filters C-4401 C4401 PRB17.5SF FC-2386 $25.95 |
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Hot Tub Filter CALDERA SPA PCD75N C-7375 C7375 FC-3964 $39.95 |
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Hot Tub Filter FOUR SEASONS SPAS C-6605 C6605 FC-3075 $33.95 |
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Hot Tub Spa Filter C-4975 C4975 PRB75 FC-2395 FC2395 $29.95 |
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Hot Tub Spa Filter C-5345 C5345 PLBS50 FC-2970 FC2970 $24.95 |
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Hot Tub Spa Filter Coleman Spas PAS35-2 7CH-322 FC-0420 $24.95 |
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Two-Pack! C-4310 PWW10 Hot Tub Spa Skim Filters FC-3077 $19.94 |
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NEW Super Pro Hot Tub Replacement Cartridge – Cal Spa, Martec – FC-1630 $23.99 |
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Pleatco PLB65 Spa Filter Cartridge fits Leisure Bay Hot Tub FC-3530 C-7415 $44.95 |
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Pleatco PVT50P For Vita Spa 7×14 TSC Coleman Spa Hot Tub Filter 7CH-50 FC-0463 $40.00 |
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Filbur FC-0196 Antimicrobial Replacement Filter Cartridge for Marquis 370-0242 Pool and Spa Filter $22.94 Filbur 35sqft Marquis Cartridge… |
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Filbur FC-3320 Antimicrobial Replacement Filter Cartridge for Coleman 75 Pool and Spa Filter $41.99 All cartridges use genuine ReemayTM spunbound polyester media. End caps for the Pool and Spa cartridges are made from a durable polyurethane material and are available in a variety of configurations. Center cores of our cartridges are comprised of punched PVC pipe for consistent flow with sharp pleat folds and thermally bonded end caps for long life and durability…. |
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Filbur FC-2370 Antimicrobial Replacement Filter Cartridge for Rainbow/Pentair Dynamic 25 Pool and Spa Filter $27.95 Filbur FC-2370 filter cartridges (Alternate names: FC2370) Filters compatible with pools, spas and hot-tubs using Filbur FC-2370 filter cartridges filters. Filter description: Diameter: 5″ Length: 13 5/16″ Top: Open 2 1/8″ Bottom: Open 2 1/8″ Compatible with all spas, hot-tubs and pools using Filbur FC-2370 filter cartridges… |
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Jacuzzi J-300 Series Spa Filter Cartridge 6540-476 – FC-2800 These replacement spa filters are also compatible with Jacuzzi part numbers 6540-476, 6541-383, Unicel part number 6CH-960 and Pleatco part numbers PJW60TL-F2S and PJW60TL-F2S. These filters are also constructed with thermally bonded polyurethane caps and a punched PVC pipe core that will ensure consistent water flow through your filters along with the durability you depend on. Fits Jacuzzi J-300 … |
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Filbur FC-2740 Antimicrobial Replacement Filter Cartridge for Sundance 65 Pool and Spa Filter $43.02 Sundance 65 SQ FT; 2-5/8″ Id Filter CARTRIDGE 7 1/2″ x 14 3/4″ 65 SQ FT16503 C7466 PSD652 FC2740 SUNDANCE SPAS 6540481For Multiple Quantities, Please Call for Quote!… |
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Filbur FC-0760 Antimicrobial Replacement Filter Cartridge for Baker Hydro UM 50 Pool and Spa Filter $38.88 7″ x 19 5/8″ 50 SQ FT, Baker Hydro Um 50 filter Cartridge15011 C7405 PBH50 FC0760 BAKER HYDRO ULTRA MITE 17B1165For Multiple Quantities, Please Call for Quote!… |