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Haywood pool heater H series error code 5f

Error code 5F

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Error code is SF. temp sensor failure

Posted on Apr 04, 2014

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5 f code after hearing poping noises filter and pump are new


SF (not 5F) = Temperature Sensor or Thermistor
HS = High Limit Sensor
Heaters Set Temperature out of Sync with actual Water Temperature.
Heaters Maximum Water Temperature has been Exceeded.
A few reasons this occurs...
  • Low water flow thru heater, check :
    • Dirty Filter
    • Opened By Pass Valves
    • Plugged pump impeller
    • Dirty/Full baskets at skimmer or pump
    • Anything that may reduce water flow
  • Sensor could actually be doing its job, in a different aspect, Thermostat failure, and water is overheating in spa or pool?
But anyway, your heaters fault code you asked about does not necessarily mean the sensor failed, but is only informing of a problem.

Jun 07, 2015 | Hayward Pool & Spa

1 Answer

What should I do if Hayward pool heater is reading error code SF??


The code is SF. This is a teemperature sensor failure. Check the wiring on the electroniics bord and confirm its not damaged and that it is securly plugged in. If all is good than the temperature sensor will need placing.m either a gas fitter or swimming pool reepair center will help with this is your not comfortable replacing it

Jul 15, 2013 | Pool & Spa

1 Answer

My mark 6 pool heater has power but is displaying "5f" help???


The actual reading is SF and that indicates a temperature sensor failure.

Mar 12, 2013 | Hayward 116k HeatPro Heat Pump HP3100

1 Answer

HRATER WILL NOT COME ON shows a code 5F


the Code 5F is a Temperature sensor failure. The temperature sensor may be defective or the controller board may be defective. If you have an ohm meter the best way to diagnose if the sensor is faulty is to contact Hayward technical support and they can help you diagnose it. If the sensor is ok then the controller board is defective.

Aug 06, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

My Haywood H250FDP heater fires up for a few seconds and goes out. After several tries I get a Low gas pressure/No gas error code. I had my propane suppier come out and check. He tried to adjust the...


the flame sensor/thermo couple can be bad and or needs cleaning --carbon build up [one day old -one year old- 20 yrs old defective or damaged parts can happen any time]

Jul 04, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

Error code either 5f or sf. any suggestions


Temp sensor failure. The temp sensor should be screwed into the header near the plumbing and is wired in to the control panel ( where you raise or lower pool temp) Almost positive the wire is blk/red

If you unscrew the temp sensor and its corroded ( green) try cleaning it with a wire brush, if it still doesnt work, replace the sensor. Worst case, the new sensor doesnt work, that means the old sensor was fine and its the board that its plugged into thats bad. Not likely, but always possible... sensor is much cheaper then a board so go that route first.

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1 Answer

Haywood heater has code sf what does that mean


SF is a thermistor error. Once the heater cools down it should reset itself. If not, call a service tech.

Jul 03, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

My 110,000 kerosene heater will not lite igniter


Pardon all of the gobbldy gook that follows but this should put you in touch with a local heater repairman. http://rd.business.com/index.asp?bdcz=go.dex.bf.e&bdclooka=akaa&bdclook=true&bdcr=2&bdcu=http%3A%2F%2Fwww%2Egoogle%2Ecom%2Faclk%3Fsa%3DL%26ai%3DCApLarKvPSo2BM4m2tQOvu%5F2pCY2M4G7fyfL5C9fLzdIxEAIgmE4oDFCPh9nQ%2Df%5F%5F%5F%5F8BYMnmwIzYpOARyAEBqgQfT9AMrxZLcHDjKnbI%5Fem1UGmTep5nDsZlopr4xY9IkQ%26num%3D2%26sig%3DAGiWqtzydku0M5xKJYt6p4aH6TBZvwnKtg%26q%3Dhttp%3A%2F%2Fc26%2Erd43%2Ecom%2Fadserver%2Fkclick%2F43755%253Fphrase%253Dheating%252Brepair%252Botisville%252Bmi%2526csdest%253D2%252Bu26%252Bl341%252Bc76%252Bts%252Bmcgoog&bdcf=&bdcs=2F2870E0-1D71-40C3-8572-DA7DF3A9D8BD20091095228958_bravo&bdcc=azaf&bdch=BDC200&bdct=20091009143129&partner=dex&pos=1

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1 Answer

ERROR MESSAGE 5F


This fault concerns the relay drive circuit. If this fault code cannot be canceled, replace the oven control (also called clock or ERC).

Jul 26, 2009 | GE JKP15 Electric Single Oven

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