Oldsmobile/Buick Repair: 91 Olds 88 climate control, blown fuses, fuse box

Question
Heating system working fine, dead the next time car started. All controls respond and dampers work. Heater motor works when wired direct to battery, but won't come on with controls. After engine warms up, still nothing. Can't find any blown fuses. Are there relays that could be cooked, wiring that has broken, or is it the control? Suggestion as to where to look would be appreciated.  

Answer
hi george, ironic that we spend all summer makeing them blow cold air and all winter trying to get them warm again lol.well george yes there is a relay for the heater.but first check the fuse box there will be a cpl of metal circuit breakers just switch them around and see if it works if so replace the breaker.if not track the relay down should be in the relay center it may say acc or heater or a|c.gotta be one of those if not get back with me and i will snoop around for info.please take a min of your time to rate my help ty billymac