Inspired by a profound observation on the Racah-Wigner coefficients of Uq(sl2), the Askey-Wilson algebras were introduced in the early 1990s. A universal analog Δq of the Askey-Wilson algebras was recently studied. For q not a root of unity, it is known that Z(Δq) is isomorphic to the polynomial ring of four variables. A presentation for Z(Δq) at q a root of unity is displayed in this paper. As an application, a presentation for the center of the double affine Hecke algebra of type (C1∨,C1) at roots of unity is obtained.