The circulation fan in my two-zone Honeywell system will not stop operation.
I have two zones in use, with VisionPro thermostats tied to a EnviraZone Control Panel W8835A1004.
I've disconnected the fan connection to the EnivraZone and the fan turns off. I've removed both thermostats and let them sit for 15 minutes without batteries, powercycled the HVAC system and then replaced thermostats and the fan operation continues (even with both thermostats set to "OFF" operation).
I think I need to replace the EnviraZone board. Are there any more tests I should perform before *having a service tech* test the EnviraZone?