'setValue' method is not working in Angular application

I am developing a web application using MEAN Stack with Angular 6. There I have a button in my html to get default values when I click that button it should fill the form field with the default value. Here is my html form.

<div style="float: right" id="extrudedHeightPanel" *ngIf="isExtrudedHeight" name="extrudedHeight">
<form #extrudedHeightForm="ngForm" (ngSubmit)="saveExtrudedHeightValue(extrudedHeightForm)" #form="ngForm">
<nb-card class="action-buttons">
<div class="form-input-group">
<div class="row">
<div class="">
<button type='button' (click)="setDefaultValues()" class="btn btn-sm btn-rectangle btn-default text-case">Restore Default</button>
</div>
<div class="">
<button type="submit" class="btn btn-sm btn-rectangle btn-default text-case">Done</button>
</div>
</div>
</div>
</nb-card>
<br>
<br>
<br>
<p>Extruded Height</p>
<br>
<div class="form group">
Extruded Height:
<input type="text" nbInput name="extrudedHeight" [(ngModel)]="extrudedHeight" />
</div>
</form>
</div>


I got the data from mongo db to my .ts file and tried to set value to the form field using 'setValue' method in Angular. .ts file

class{

extrudedHeightForm: FormGroup;
ngOnInit()
{
this.extrudedHeightForm = new FormGroup({
extrudedHeight: new FormControl()
});
}

//Set default values for extrudedHeight
setDefaultValues() {
this.extrudedHeightService.getExtrudedHeight("default").subscribe(data => {
this.extrudedHeightForm.setValue({
extrudedHeight:data['extrudedHeight']
});
});
}

}


My question is the following part is not working. Am I gone wrong or is there any method to achieve my requirement.

this.extrudedHeightForm.setValue({
extrudedHeight:data['extrudedHeight']
});


--UPDATED-- When I changed into this.extrudedHeightForm.get('extrudedHeight').setValue(data['extrudedHeight']); as suggested in the answer it does not work either. To check the value I printed a console.log. 'console.log(this.extrudedHeightForm.get('extrudedHeight'));' part gives the following values.

But the value 250 does not show in the form field.

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