Check your aux fan if it is working. Sometimes umiikot pero mabagal pala.

Kapag umaandar and ganun pa din. Try to rev up the engine ng tuloy tuloy while stopped. If lumamig, your compressor is suspect.

Minsan kasi hindi na kaya gumawa ng pressure ng compressor at idle dahil sira na. Pero kapag high revs (e.g. tumatakbo), nakakacompress pa.