volvowagoon
Active member
- Joined
- Jul 19, 2012
- Location
- Franklin, IN
Hey guys,
I'm trying to get a head start on repairing the HVAC issues in my girlfriends 240. I actually started thread about wanting to get the AC working months ago, but it didn't quite pertain to the issue I'm addressing here. I'll update that one once I can deem my electrical system good-to-go.
What we are noticing is that the blower motor runs in all speeds just fine, but also runs on low speed in the off position. Upon further inspection I noticed that the compressor clutch is also on at all times. Nothing changes if I move the thermostat into any position, so something isn't working right.
I generally hate diagnosing wiring issues in old Volvos now. RIP volvowiringdiagrams.com.
However, thanks to cleanflametrap I have this nice simple drawing. I think I can trust that he has it drawn correctly.
First of all, let it be known that we did not drive it long with the AC clutch stuck on. I unplugged the pressure switch pronto because I'd like to continue using this compressor some day. If I study the diagram, it would appear to me that the t-stat is stuck closed and allowing power to the relay and therefore those two malfunctioning circuits. I've never done one of these, and they're kinda funky so this will be an interesting adventure.
Does my diagnosis sound correct to you guys? Thanks. I'll post updates.
I'm trying to get a head start on repairing the HVAC issues in my girlfriends 240. I actually started thread about wanting to get the AC working months ago, but it didn't quite pertain to the issue I'm addressing here. I'll update that one once I can deem my electrical system good-to-go.
What we are noticing is that the blower motor runs in all speeds just fine, but also runs on low speed in the off position. Upon further inspection I noticed that the compressor clutch is also on at all times. Nothing changes if I move the thermostat into any position, so something isn't working right.
I generally hate diagnosing wiring issues in old Volvos now. RIP volvowiringdiagrams.com.
However, thanks to cleanflametrap I have this nice simple drawing. I think I can trust that he has it drawn correctly.
First of all, let it be known that we did not drive it long with the AC clutch stuck on. I unplugged the pressure switch pronto because I'd like to continue using this compressor some day. If I study the diagram, it would appear to me that the t-stat is stuck closed and allowing power to the relay and therefore those two malfunctioning circuits. I've never done one of these, and they're kinda funky so this will be an interesting adventure.
Does my diagnosis sound correct to you guys? Thanks. I'll post updates.