Hunter thermostsat conversion problem

[DeansDad]

I decided to do the Hunter 42999B conversion on my TT as the Duo-Therm thermostat was like all the others.
I have a Dometic Duo-Therm 13,500 roof air, and I THINK an Attwood furnace (if need be I can remove cover to check).

Here's what I did:

red wire was on Duo-Therm +7.5 terminal, I didn't use it

yellow wire was on Duo-Therm cool terminal, to Y on Hunter

white wire was on Duo-Therm furnace terminal, to W on Hunter

blue wire was on Duo-Therm hi fan terminal, temp not used

orange wire was on Duo-Therm fan terminal, to G on Hunter

green wire was on Duo-Therm gnd terminal, to RC on Hunter

I left the jumper from RC to RW in the Hunter

Also, the small switch is set for HG

I have the furnace working properly, but when trying A/C all I get is the compressor running, no blower fan. Also, there is no fan when the manual fan position is switched on, either.

This seems so simple a conversion, can't believe it's not working right.

[Mont_G_J]

Only need to add a switch if you want low and hi air conditioner fan speed. I run mine on low (orange wire connected) and like it just fine that way.

I don't see anything in your post that reflects incorrect wiring. Perhaps your next step should be to check for voltage on the orange wire.

Here's a good set of instructions to double check your work: CLICKY FOR HUNTER T-STAT

[midnightsadie]

ok I gotta ask, why are people changing the stats?

[Snowman9000]

I've run mine without the switch. First on the high fan wire, and then the low fan wire, which I liked better. OP, I don't have the info to help you troubleshoot it, sorry.

[donn0128]

Did you add the SPST mini switch? You need it in the system to make the AC fan work correctly. AC fan is normal high speed.