help with my miele condenser plz

[elecroking]

hi all i picked up a condenser dryer today to fix and use, its working but giving no heat, it runs on normal not timed for 1 min then stops and beeps like an alarm clock and finish light stays on, ive seen a thread on here and "zipper" i hope i spelled that right was fab with their advice so hoping someone can help me if poss, im no mechanical whiz so just doing what i see online, the thermo and rear temp sensor are reading blank on my draper multimeter [set to 200 ohm] but i get readings with the heater on its plug at the main board, sorry forgot to mention miele t294c
thanks