payne furnace prob
 

after turning on the heat the furnace combustion box overheats causing manual limit switch to go off . i have the heat set to 66 degree however it only gets to 58 degrees. the furnace exhaust gets a natural gas smell outside. the furnace gives code 33, and blower motor runs until i reset furnace it was installed 97

i replaced cleaned
cleaned intake and exhaust pipe
thermostat
air filter
replaced burned out draft inducer
last yr replaced flame sensor and flame ign.
payne furnace model #490aav036060

not getting enough air flow across the HX .dirty coil. closed off vents , not enough return air

i cleaned the coil

all vents open air comes out

Is this 1 of the small limits that you reset by pushing a small button. If so it's a roll out limit & you need to have the H X or vent system checked

yes it is one of the small ones u push in did and over heated ? could u be limit switch on fire wall

Can't make out what this means. You need to have a PRO check your unit

. [IMG]file:///C:/DOCUME%7E1/owner/LOCALS%7E1/Temp/moz-screenshot.png[/IMG][IMG]file:///C:/DOCUME%7E1/owner/LOCALS%7E1/Temp/moz-screenshot-1.png[/IMG]one of my friends thought that the Heat exchangers, are sooted and or limit switch on fire wall behind draft inducer is at falt