My heater will not go on. It is receiving power and is attempting to  start however it is making a very rapid ticking sound.

With the symptom given, it's possible that the pilot may need to be cleaned and /or the pilot is not getting gas to it. Other than this, it would be best to have a technician check out the heater. 

My heater is constantly cycling on and off. What should I do?

First, turn it  off. Do not continue to use it, as it is not burning properly. Start by cleaning  your filter and making sure your thermostat is turned all the way up. If the  heater is still cycling after doing these things, call the builder or dealer who  installed it and arrange for a technician to look at it. If your heater has been  installed within the past year, it should be under warranty.

How do I change my heater from natural gas to propane gas?

Converting your  heater from natural gas to propane requires the change out of the burner tray  assembly and the electronic control module. We do not recommend that this be  done in the field for the most part. If the conversion must be done on site, we  always recommend that a qualified field repair technician perform the necessary work to ensure proper performance and operating safety.

I just installed a gas heater and I am concerned that it might not be  big enough to heat my pool effectively. It seems to take about 5 hours to bring  the temperature up about 3 degrees.

The time it has  taken for you to heat your pool 3 degrees is correct. The heater is working  fine. We would suggest you cover your pool. This will save gas and money, as  well decrease the time needed to raise your water temperature.

Why is the power element on my gas heater corroded?

There are a  couple of reasons this may have happened. It may be either chemical corrosion,  due to improper water chemistry, or caused by excessive water velocity, which  results in etching of the metal of the power element. It may even be a  combination of the two. First of all, make sure your pool's water is at the  proper pH (between 7.4 and 7.6) and your pump is operating at the proper flow  rate for your heater (consult your heater specs). If the problem persists,  contact a pool professional