best pool heater there has to be one

[criis]

Have a Raypak 2100 millivolt gas, that in my opinion has never worked right. too much sensitivity to pressure, and has never been realiable. Pool company has been out to servide it plenty, and it's about 5 yrs old. Now they tell me (others have said so as well) to trash it and buy a new digital or electronic start machine in delendently or through them. they can't get it working either. Are millivolts that unrelaible?

I have 22,000 gallon gunite (an Andrews special,1 skimmer, 2 jets, main drain is closed up) in-ground. Wife likes it at 82. Backwashing used to help now nothing..Did a "Fonzy" with a few light but flat taps on the gas/millivolt mech in the box and it actually fired for about 5 mins before shutting down permanently.

I've had it with this thing...pool was replasterred 5 years ago as well. What is the best made pool heater for reliability and low maint and what should I expect to pay installed? thanks!!!

Carl