Lennox S40 HW Rev B

Third party integrations
1

Last summer I updated the HVAC in our pool house and it included an S40. I used the 3P integration and it worked just fine.

This week I had to update the HVAC in the house and it too came with an S40. This one doesn’t want to connect and after some sleuthing, I have at least discovered a difference.

Both thermostats are on the same VLAN. Both thermostats are running the same software revision. The pool house however is hardware revision A while the new one is hardware revision B.

Using nmap on the rev A theromstat I get these ports open:

53/tcp open domain
111/tcp filtered rpcbind
443/tcp open https

However on hardware rev B, there are no open ports. I’ve done the searching I can do and I haven’t found any obvious step to enable local API access nor does the integration documentation describe that step.

I’m wondering if anyone else has run into this. It’s unclear whether I have a partially broken S40 or starting with hardware rev B they’ve cut off the local API access.

2

Were you able to get this working? I’m looking at getting a Lennox system potentially w. an S40 thermostat.

3

I have a new HVAC system going in Monday with an S40 - has this been resolved?

4

Have you filed an Issue on the github page?

5

Any updates on this. I’m the integration owner and this is highly concerning.

6

How were you able to determine the HW revision?

7

I hope this gets resolved, I’m supposed to begetting an 8 zone system and the S40 as the main thermostat along with the 17a30 and was counting on the HA integration to work. Hopefully this is not a H/W issue!

8

I’ve received no bug reports or logs confirming that this is actually an issue. This topic is the only mention of it and the OP hasn’t responded.

9

I helped someone 2 weeks ago with a Hardware Revision B thermostat, and the local connection worked first try.

1 Like
10

Update - my local installation worked 1st time. Have since reinstalled twice due to IP address changes