10-17-2016, 05:15 AM
Not sure if they still do this but I, and others, have called or emailed Grohe and they sent free replacement parts under their lifetime warranty.. Worth a try if you think the cartridge is bad.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
PO 1999 Foretravel 36'
1998 Newell 45' #486
1993 Newell 39' #337