I had a small leak in the heater control valve which helped me locate it. Didn't even need UV light. I just saw the green color on and around the valve. When I grabbed the valve, it broke in my hands. If I hadn't replaced the valve, this could have been a big problem.
Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review
Tool set Ombra OMT82S12, 82 pcs, brown
22 Review
Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review
DVR 70MAI Dash Cam Pro Plus+, black (A500S), black
87 Review