Why did Hot and cold switch on kitchen sink?

Left knob was hot and the right was cold, until 2 days ago. Now its switched.very weird.no plumbing work done anywhere.what happened here?

This entry was posted on Saturday, August 13th, 2011 at 5:07 am and is filed under Kitchen Sink. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.