Bryant evolution 90i model 355AAV042060. Get a error message on the thermostat display to contact technican. Dismissed notice and everything returned to normal. 36 hours later I get same message and again dismissed message the furance runs fine and the thermostat returns to normal look. I went into the thermostat diagnostics service menu and it showed a "No communication with indoor unit" error had been logged. Also I checked the error code display on the furance and it has solid amber and green lights but neither are blinking an error code. Any idea what could be causing this intermittent problem and lack of communication? FYI tfhe furance is 13 years old. TIA

Hi, My furnace is reporting "Pressure Switch Stuck Closed". While searching for information, I came across my post own here from 2013 and the behavior and symptoms are *identical*: [url]https://www.doityourself.com/forum/gas-oil-home-heating-furnaces/495072-pressure-switch-stuck-closed-running-out-parts-replace.html[/url] This time, cleaning the flame sensor did not solve the problem. So I replaced the flame sensor, which also did not solve the problem. I have not replaced other parts yet. I have cleaned the condensate trap, which was gunked up. I have inspected all of the tubes/hoses/vents. I would appreciate any advice. I don't feel like replacing several major parts like I did last time (to no avail). Regards, Ryan