Jeep Repair: 2004 Jeep GC Heated Seats, jeep grand cherokee, electric heating elements

Question
Had complete HVAC repair done (blend doors, recirc, heater core, etc). Involved complete dashboard removal. Heated seats do not work after job. Brought back and they said switches work and transmitting correct ohms, but was too warm for heating element to operate. It’s 65 degrees today and no heat.

Question: Could they have shorted and/or disconnected something to make inoperative.  Or is 65 degrees to warm to activate.  I seem to remember working last year in similar ambient temps.  Is this just a coincidence?

Appreciate your help!

Answer
when I do blend air doors  I dont disconnect the switches to the heated seats.
did u see if U need the recall done  and if it applies to your jeep or not?

Safety Recall F17
Heated Seat Elements
2003-2004 (WJ) Jeep® Grand Cherokee
NOTE: This notification applies only to the above vehicles equipped with heated
front seats (sales code JRH, JTF or JTG) built after September 10, 2002
(MDH 091006).
The front seat electric heating elements on about 123,000 of the above vehicles may
overheat and cause an interior fire under certain operating conditions.
Both front seat heating elements must be replaced