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The fan 1 and fan 2 relays are for the engine cooling fan. The HVAC blower relay is called the Heater relay, and it is in a junction box above the glove compartment.
viewtopic.php?f=18&t=5078 talks about that junction box, and has this picture showing the heater (blower) relay
There have been a few people that have had relays in that junction box not fully seated. Hopefully your problem will be that the relay just needs to be pushed back into the socket. You should be able to reach up and find the relay by touch, pull it into the junction box without having to unbolt and drop the junction box. Probably not the problem, but is worth trying before you drop the junction box for access.