BAYSTAT339 programming to Honeywell RTH7400 - http://www.hvacmechanic.com/ Forums


Original message

krowan

198.6.95.95

"BAYSTAT339 programming to Honeywell RTH7400" , posted Tue 21 Oct 10:31user profileedit/delete messagepost reply

We recently installed the honeywell RTH7400 (5-1-1) programmable t-stat replacing our VERY OLD Baystat339 t-stat. We have about a 20 yr old Trane Heat Pump and now nothing is working.

We think we wired everything correctly by looking at this website and also the directions. I think the fan might work but nothing else is turning on - no heat, no AC, the unit lights up and you can turn it to heat but nothing happens. Does anyone have any information on correct wiring so I can go back and figure this out and maybe programming??

Thanks

Rowan

 


Replies:

techshawn

70.52.160.10

"Re(1):BAYSTAT339 programming to Honeywell RTH" , posted Tue 21 Oct 19:09user profileedit/delete messagepost reply

read the instruction of installation. it's pretty detailed.

I like fixing everything.

 

 

Houston204



98.196.66.53

"Re(2):BAYSTAT339 programming to Honeywell RTH" , posted Tue 21 Oct 23:22user profileedit/delete messagepost reply

Recheck your wiring, especially the old B which is now C.







Option 170 = 7
option 190 = 0



Replace the fuse in the air handler after rechecking your stat wiring. It will probably be this one...

"Tip of the Day" Remember to remove power first.

 

 

Houston204



98.196.66.53

"Re(3):BAYSTAT339 programming to Honeywell RTH" , posted Tue 21 Oct 23:23user profileedit/delete messagepost reply

Color codes vary.

"Tip of the Day" Remember to remove power first.