Rheophilic fish like plecos require high oxygen content to be thriving. High temperature water holds less oxygen...If the tank is heavily planted, one can get away with high temps because plants ensure high oxygen content, otherwise, one should stick to the particular's pleco low temperature range or blast the tank surface with very high flow and hope for the best.
The temperature in my tank around 28-30c the Pleco seem active and healthy for many years. The list : L24, L25, L273, L155, L191, L007, L200A, L075, L27, L114, L46