One problem related to front seat heater/cooler has been reported for the 2002 Volvo V70. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Volvo V70 based on all problems reported for the 2002 V70.
Fyi: Volvo has a silent recall/ replacement of seat bottoms when your seat heater has malfunctioned and burned a hole through your seat. A hole magically appeared in my seat bottom and fortunately didn't burn me. Volvo replaced the entire seat bottom unit with a new seat bottom for free at 188,000 miles!.