Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1
Just installed, new hayward pool heater H200FD. Keep getting error code LO. What should I check.
Is the heater installed indoors?? if so you'll need a vent pressure orifice kit.
if not check your water press. (below 18 PSI on filter) Place filter on "recir" if it fires and stays on . it's the pressure.
check to see if all connections a set tight hi-ltd switch wire harness etc.
Posted on Jun 07, 2009
LO is simply informing you that the Heater is not sensing proper water flow through it! A special sensor, called a pressure switch is this source. But... That does not mean it is bad - No, it is in most cases just doing its job!
Most common reason - Dirty Filter.
A good cleaning of the cartridges, or maybe a breakdown and recharge of a DE Filter, or a good cleansing backwash of your sand filter, will remedy this situation.
Posted on May 25, 2015
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Posted on Jan 02, 2017
Tips for a great answer:
Sep 20, 2012 | Hayward H350FDP Low NOx Propane Gas Pool...
you for posting your question here on Fixya.com.
A 'LO' error code
for a Hayward heater is a limit string open error. If the limit string opens
the heater shuts down and goes into lockout. Automatic restart is 2 minutes
after the error condition is corrected and the limit string closes.
The limit string is
a series of switches designed to turn off the heater if air or water
temperatures exceed a safe operating limit.
The problem may be
faulty a switch(es) but is far more likely to be a system condition the
switches are reacting too that needs to be corrected. Low flow of combustion
air due to obstructions around the heater or the vent; low flow of water
through the heater allowing too high a water temp; Poor venting or sooted-over
heat exchanger causing flame rollout; inlet and outlet hose connections
reversed; these are all conditions that should be eliminated if they exist.
If you are not
familiar with these switches or the conditions described you may want to
consider calling in a professional. Hayward can refer you to someone in your
area who is. Call Hayward at 908-351-5400 or try the website locator found here. It is likely to
still be covered under warranty.
this answer does not fix your problem, please comment with additional details
prior to rating the answer. You may also contact me thru our website at www.arrowpools.net. Positive feedback is appreciated
once your problem is solved!
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