This article contains the AG300UK/AG550UK Series Ninja® Foodi® Health Grill Troubleshooting Guide. This supports the following SKUs: AG300UK, AG301UK, AG301UKCO, AG550UK, AG551UK and AG551UKCP. Please note this also supports the refurbished models AG301UKREF, AG301UKREFB, AG551UKDBCPREF, AG551UKDBCPREFB and AG551UKDBREFB.