If the unit is propane or gas, the flame sensor may be bad or not in the flame long enough to "lock" the circuit on. Some units require you to hold the pilot on for 10-15 seconds to heat the sensor enough to "make" the cicuit. If in doubt, call a professional because gas and propane can be VERY dangerous.
Additionally, when was the last time the filter was cleaned?
form_title= Pool Heater form_header= Stay warm and swim with a pool heater! What is your budget for a pool heater?*= _  What type of pool do you have?*= () Salt Water () Chlorine What is the size of your pool?*= _ 
This job is best left for a qualified pool tech who knows the codes in your state. One wrong part of the installation could get you seriously hurt.
What i s the best pool heater
The heater will not operate if the pump is not on.
directions for closing above ground pool with heater
Do you mean a pool that has a salt water generator? If so, any pool heater could be used.
locate pool in sunny area, use a solar water heater, solar pool cover, pool heater or enclosed sun room
it depends if you have a pool heater
no you need a stronger heater specifically designed for a swimming pool
Start with a "maxtemp pool heater" search.
At a minimum you would need a 400K btu gas heater. This pool is larger than a 20 x 40' pool or 800 sq. ft. Many things dictate the size or sizing of a pool heater such as the surface area of the pool, the size of the gas line from the meter to the heater, the distance of the run from the meter to the heater, the size or capacity of the gas meter, etc. Proper sizing is a must if your heater is to run at optimum standards.
You can buy a swimming pool heater in the Burlington, Vermont are at Leslie's Pool Supplies. They have a great selection.
You probably need to replace the light switch
Recommend 400,000 BTU heater
The swimming pool heater service usually takes about 1 to 2 hours. This of course can change if you have a larger heater.
it goes ....pump, filter, heater, auto feeder, back to pool...this way the super chlorated water doesn't hurt the heat exchanger...
Sounds like a leak on the suction side of your equipment.
Yes! Connect a garden hose to the output valve of the water heater and open the water heater valve to put hot water into the kiddie pool. This is the fastest way to warm a children's pool.
Heaters are usually plumbed in after the filter. The pool filter/pump is what circulates the heated water. Ans: The heater will not work or fire if the pump is not running.
The benefits of a solar pool heater are a much lower electricity bill, a quieter heating system, and an eco-friendly alternative to traditional pool heating systems.
Approx 4.4 gallons per hour on full blast.
Solar pool heaters can be purchased from Lowe's, Global Industrial, Solarhome, Pool Supply Unlimited, Home Depot, and Sears. One may also find a solar pool heater from a local pool supplies company.
You can warm up a cold pool buy buying a pool heater