There were some unit issues as well as infrastructure concerns which I believe were all resolved and testing happened so it's just awaiting a proving and sign off run with the relevant bodies was the last I heard.
5 (and 6) Car 197s can run Cardiff to Chester, its Shrewsbury-Manchester where they're not.
6s won't happen yet between Shrewsbury and Crewe as the testing for those failed with asdo issues, a software upgrade in the future may see it happen but for now 5s will be the best that route gets.
It was ASDO issues holding things up; when in more than a 2 or 3 car unit the section between Shrewsbury to Crewe has a lot of stations that require the train to stop past the platform in some cases (Wem in the up direction) or have the back of the train hanging off the platform (Wem in the down direction), normally due to level crossings at stations; Prees, Wrenbury and Nantwich fall under this category. Even though these 5 or 6 car 197s wouldn't be scheduled to stop at these stations on most diagrams (especially the request stops Prees, Yorton and Wrenbury), the ASDO still needs to be setup for this eventuality if a special stop order is issued, or the train needs to stop there for any other degraded reason.
The issue with the ASDO revolves around door offsets, i.e. how many doors are to be locked out of use from the back or front of the train. In the older versions of the on board software (If I'm understanding what was explained correctly) offsets could only be specified from the back of the train. Meanwhile in the new version, which was tested a few months ago when I was on the test run, they can be specified from the back or the front - meaning the ASDO can now be used correctly on these awkward station stops, and hence the need for testing. There is still the issue that the offsets are fixed regardless of the train length - i.e. regardless of if it's a 4, 5 or 6 car it'll still lock out the same number of doors meaning you'll lose more doors than necessary sometimes - this will be changed in another future software update where variable offsets become possible, determined by the train formation.
For now though they're going to sign the units off into service with the current software version, which still requires another test run to my knowledge where representatives from the unions, DTMs and conductor managers are on board etc
No from my experience of the 197s is that they aren't blowing any air at all, let alone conditioned air. It has to be some sort of fault as I can't believe they are running as designed
To give some context from the driver's side: there are a lot of aircon faults going on at the moment - on the TCMS we have a HVAC page to view the status, and often (without any fault being raised in the station tab, for ref this is the page that lists all faults) the icon for the saloon HVAC units turns red, meaning it's encountered an error.
It is possible for the more twigged on drivers to turn the saloon HVAC off and on again from the TCMS, which I've done a few times when I've noticed this happening - no idea if it actually fixes the issue but the status colour for the HVAC units stays blue after doing this. Watching it though I can often see that in one unit the temperature stays more where it should be, while the one that had the faulty unit doesn't reduce temperature - which to me says turning the HVAC off and on doesn't really fix anything.
Interestingly I've also seen faults with the cab heaters getting stuck on recently as well, was continuously blowing hot air with the air con then on as well trying to fight against it... had two cabs in the same day doing this. Only solution here is to trip out the cab heating MCB, with permission from maintenance control of course. Does mean you have no heating, only HVAC, which is fine on hot days though.
It does make me wonder if the recent software update that's being applied to the 197s is causing a few unexpected issues, as there are other issues as well like not being able to put the train into coupling mode when uncoupling, which makes reversing off to the 2ft distance more difficult as you don't have the power limited (which is all coupling mode does really, limits max speed and power output - after pressing the uncouple button it should be available to use even though you're not coupling up, just to control your speed).