15 amp cutler hammer branch feeder type AFCI triped off and will not turn back on. I have tried switching off for 10sec and then back on and still nothing. Also, the test button will not do anything. The house is 2 years old and I have never had a problem before and nothing new is pluged in to that circut.

If the breaker has tripped the test button won't do anything ,, for the breaker to trip something down stream of it is causing this to happen,, check all the switches and or receptacles in the circuit that are controlled by this breaker, 3 types of line problems cause tripping,, ground to line, Line to line, and line to neutral. in this ,, also consider that extension cords, faulty appliances , ( lamps, radios, anything plugged in with a feedback short ) will cause the breaker to trip. even a nail to hang a picture that pierced the wire can cause this, add to that , a AFCI breaker will trip much more easily than one thats not, or even a GFI breaker, , try this, if you have the knowledge to do electrical work in a panel, if not get someone who is, switch the tripping breaker with another one of the same value, ( in this case 15 amp) see if the one you put in place of the one thats giving you problems trips. If it doesn't, you have a weak or bad breaker, so just replace that one, if it does, your going to have to trace out that entire circuit to find the reason for the feed back into the panel