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High condensing temp causes waxing in the cap tube restricting it. If I work on a 134a system that is not keeping temp and find the condenser plugged or the condenser fan burnt out I usually end up...

Thermostat might be stuck in bypass.

Sounds to me like the booster heater is full of scale.

I have worked on many of these units. They use tev's now and every time I run into a older one with a restricted cap tube I install a tev instead. I think they use a 1/4 ton internal equalized...

I work on a lot of critically charged units and usually when you charge by the data plate and the back pressure is still low it is because the cap tube is partially restricted. Many techs will just...

I would say either one of the flame sensors or one of the ignition modules. I would start with 2 flame new sensors. I don't think it is a computer problem, usually when a computer goes bad and says...

Hobart puts a s shape on the end of the thermostat cap tube then inserts it in the middle of the coil. On a few units there are stand off brackets that hold a 3/8 copper tube and the cap tube goes...

Did you melt the frost I see? It might be under that.