## 2.18 `FAULT` command

### 2.18.1 Syntax

`FAult` partlabel=value ...

### 2.18.2 Purpose

Temporarily change a component value.

### 2.18.3 Comments

This command quickly changes the value of a component, usually with the intention that you will not want to save it.
If you apply this command to a nonlinear or otherwise strange part, it becomes ordinary and linear until the fault is removed.
It is an error to `fault` a model call.
If several components have the same label, the fault value applies to all of them. (They will all have the same value.)
The `unfault` command restores the old values.

### 2.18.4 Example

`fault R66=1k`
  R66 now has a value of 1k, regardless of what it was before.
`fault C12=220p L1=1u`
  C12 is 220 pf and L1 is 1 uH, for now.
`unfault`
  Clears all faults. It is back to what it was before.