Suzuki: 1996 suzuki sidekick sport jlx 1.8, suzuki sidekick sport, 1996 suzuki sidekick

Question
I have no heat. The gauge stays of C, never goes beyond this unless overheating. I have checked the thermostat, replaced the radiator, both heater hoses, and had the heater coil checked.  is there anything else that I can check for heat?

Answer
HOW did you check the thermostat?  It's the device which does all the control of running temp.  It's supposed to open at 192 degrees.  Have you verified that it stays completely closed until that temp?

Just replace it with a new one, from a source that will guarantee it.

Given your problem, that's almost certainly the cause.