ZPB140 Port A Blaster HVAC Coil Cleaning, Coil Jet Cleaner for ac Unit 120V 80W for Indoor or Outdoor, Flow Rate 4L/min, Working Pressure 0.7-1.0MPa

Ours was cleaned a couple of days ago with a machine similar to this in function. It's a five year old system and the coil was caked with dust, so I may have a leaking return duct. https://www.amazon.com/dp/B0DQJJ8W1Z?lv=shuf&redirect=true&hvlocphy=72359&psc=1&linkCode=df0&hvnetw=o&hvadid=80470717339152&dplnk=Y&hvbmt=be&dplnkId=c154f148-3477-4fe5-ad3e-a122786c31da&hvdev=m&hvocijid=6827252603835248523-B0DQJJ8W1Z-&hvexpln=0&hvqmt=e&tag=bingshoppinga-20&hvtargid=pla-4584070200563644&channelId=69&ref=cm_sw_r_cso_em_apin_clp_QF7PE59SZH95Z467TRCY_1&ref_=cm_sw_r_cso_em_apin_clp_QF7PE59SZH95Z467TRCY_1&social_share=cm_sw_r_cso_em_apin_clp_QF7PE59SZH95Z467TRCY_1&plpRedirect=mhFallback