HRV Operation Question

[06Honda]

I have an HRV that runs via a wall mounted dehumidistat. I turn the dehumidistat dial until it clicks to start the HRV, problem is it doesn't always startup. It can take a few tries but once running its fine. Any ideas what may be causing this. Not sure if it is the dehumidistat or the unit itself. The HRV is a Venmar AVS Constructo 1.5

[HayZee518]

change out the relay. contacts aren't making up or may be pitted.

[adnadeau]

Does your dehumidistat have a push button on the right that cycles through the various stages? If so, does the HRV work okay in those modes? That would tell you if it's the controller or the HRV. I just let my HRV run on LOW all the time during the winter.

Check around pg 27 in your owner's manual. There's a troubleshooting section there. If you don't have the manual, you can download it from the Venmar web site