I have a Marvin ceiling mounted heater that I installed in the garage a few years ago.
Today I pulled the string and it broke (came out of the hole). There is no string on the outside of the heater now or I would just tie it back on.
I've been looking around online re: broken pull-cords on lights (can't find one for a heater) and they say to replace the switch.
Do I really have to do this?
Help please!
Help! Sync Pulse!! 
I don’t know about heaters, but I once replaced the pull chain switch on a ceiling fan/light.
It wasn’t that bad.
Your problem, though, may be a slightly different creature.
Dismantle the unit enough to see inside.
If there is any bit of chain stemming from inside the switch, you may be able to simply attach a longer chain to it.
You can buy chains with extension connection pieces in the lighting dept. at the hardware store.
Unfortunately, it’s MORE THAN LIKELY the chain ripped out of the switch all together.
If so, you will have to replace the entire switch.
Several things:
1.) Try to remove the switch – you’ll have to do this at some point
regardless.
MAKE SURE YOU REMEMBER HOW IT WAS CONNECTED SO
THAT YOU CAN CONNECT THE NEW ONE!!! Pay attention to where
specific wires go, etc.
2.) Contact the heater’s manufacturer to see if they sell replacement parts.
Sometimes the company will even send you the part for free, so try to
sound sexy on the phone.
3.) You may even take the switch to a hardware store and ask someone about
it. Make sure to specify what the switch is for. There are different kinds of
chain switches that look the same, but behave differently. Electronics are
often temperamental.
