Swimming Pool Heater Troubleshooting

By Author: Steve Merillat
Total Articles: 14
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How Much Fuel Does My Swimming Pool 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 thermo (100,000) BTU per 100,000 BTU's heater size. Your gas is usually billed by thermos.

I Have Rust Returned Into My Swimming Pool


Sanitizers or chemical imbalance can deteriorate protective coatings on heater components and create rust. Rebalance chemicals and replace damaged components

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.

Our Pilot Will Not 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.

Our Pool 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.

Our Pool Heater Will Not 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.

Our Swimming Pool 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 Swimming Pool 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.
S.Merillat(r)

To learn more about Troubleshooting your Swimming Pool Heater, visit http://www.1800pools.com
Steve Merillat has been in the Pool industry for 35 years. He started early on working for various Swimming Pool supply companies before ventured out in his own business. He pioneered many processes with the installation of pools that are used as industry standards today. He regularly holds seminars and classes on how to properly maintain your Swimming Pool. Visit http://www.1800pools.com