My heater will not ignite
- Is the system switch on?
- Is the thermostat up to temperature?
- Is the pump running with a clean filter less than or equal to 16 psi on pressure gauge?
- Is the gas valve in the on position?
- Is the pilot lit?
- Is the gas supply valve open?
- Are all plumbing and filter valves open?
- If a bypass is installed, is it properly adjusted?
- Contact a qualified technician if you still cannot find the problem.
The pilot won't light
This could be due to low gas pressure, inadequate air supply, or
improper venting. Make sure gas is turned on; with propane, make sure
the tank has fuel. Also check for water run-off from roof or sprinklers.
Heater won't reach the desired temperature
The thermostat may be set too low. If the heat loss is greater than
the heater input - the heater may be too small, outside air temperature
is too low, inadequate gas supply. You may want to install a solar
cover to slow heat loss.
The heater cycles on and off before it reaches the desired temperature
Inadequate water flow due to a dirty filter, closed valve, external
bypass needs adjusting, reversed water connections, or pressure switch
out of adjustment. It is also possible that your thermostat is out of
calibration or needs replacing.
Why do I need to frequently relight my pilot?
See previous two questions for additional information. Also check
for water run off from above or sprinklers directed at heater. A high
wind stack may be needed due to heater location. Further
troubleshooting will require a service technician.
I hear "clicking" or "sparking," but my heater will not ignite
Review the Owner's Manual if you do not find your answer, turn the heater off and contact a qualified servicer.
The heater is leaking water
The heat exchanger may be leaking because of chemical or sanitizer
damage. The damage may be from winter freeze - usually leaking upon
spring start-up. Contact a qualified pool service technician.
The heater appears to leak only when the burner is lit
This may be caused by condensation (occurring when heating very cold
water); a missing or damaged bypass; or excessive water flow through
the heater from an oversized pump.
Heater top blackened and/or emitting dark exhaust
Either low gas pressure and/or inadequate air supply and venting,
review the installation requirements in the Owner's Manual. Both
conditions may need to be evaluated by a qualified service technician.
The heater has damage due to excessive heat. Why?
One, or a combination of the following: low gas pressure,
downdrafting, air supply, and venting. The heater may need a high wind
stack, if installed near a vertical wall or windy area. Contact a
qualified service professional.
I have rust returned into my pool
Sanitizers or chemical imbalance can deteriorate protective coatings
on heater components and create rust. Rebalance chemicals and replace
damaged components.
My heater whistles
Low gas pressure can cause whistling in the burners. Check your Owner's Guide or contact your installer.
Do Hayward heaters need heat sinks or a fireman's switch?
No. Hayward heaters cool down immediately after shut down.
What should my heater be set on?
All heaters should be installed on a non-combustible material, such as concrete or block.
Can Hayward heaters be installed indoors?
Yes, specific conditions apply. Please consult your Owner's Manual for complete details.
How much fuel does my heater use?
Propane heaters use one gallon of fuel per hour for each 91,000 BTU's of heater input.
Example: A 250,000 BTU heater uses: 250,000/91,000 = 2.75 gallon per hour
Natural gas heaters use one therm (100,000) BTU per 100,000 BTU's heater size. Your gas is usually billed by therms.
