From.value will not show disabled controls so use getRawValue() ~ http://azanebrain.github.io/news/angular-snafoo-form-value-vs-getrawvalues/

angular-form-value-vs-getrawvalue.ts

public myForm: FormGroup

constructor(private formBuilder: FormBuilder) { }

ngOnInit() {
    this.myForm = this.formBuilder.group({
        enabledControl: ['hello'],
        disabledControl: [{
            value: 'world',
            disabled: true
        }],
    })

    console.log(this.myForm.value)
    /*
    Outputs:
    {
        enabledControl: 'hello'
    }
    */

    console.log(this.myForm.getRawValue())
    /*
    Outputs:
    {
        enabledControl: 'hello',
        disabledControl: 'world'
    }
    */
}