# Thermostat repair trouble **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 22, 2008, 5:55pm UTC](https://community.cartalk.com/t/thermostat-repair-trouble/21076 "2008-10-22T17:55:52Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jaimetoes](https://avatars.discourse-cdn.com/v4/letter/j/e19b73/32.png) [@jaimetoes](https://community.cartalk.com/u/jaimetoes)\ **Post date:** [October 22, 2008, 5:55pm UTC](https://community.cartalk.com/t/thermostat-repair-trouble/21076/1 "2008-10-22T17:55:52Z")
Hey, I’ve got a 1990 Toyota Corolla and I’m having a little trouble with my thermostat. Last week the car overheated and I checked the old thermostat in a pot of boiling water and found that it was stuck. I replaced it and I can’t seem to get the car to work right now. I put it all back together, filled up the car with coolant and then started it up. The car warmed up to normal operating temp but I never could get any heat out of the heater. When it overheated last week, I got plenty of heat out of the heater. Am I putting the thermostat in wrong? The old thermostat had a little jiggle valve or whatever on it, this new one does not. Is that a problem. I’m reading something about the angle these thermostats need to be to go into the car – I can’t figure what angle this should be if it doesn’t have a jiggle valve. ---
**Author:** ![jaimetoes](https://avatars.discourse-cdn.com/v4/letter/j/e19b73/32.png) [@jaimetoes](https://community.cartalk.com/u/jaimetoes)\ **Post date:** [October 22, 2008, 6:52pm UTC](https://community.cartalk.com/t/thermostat-repair-trouble/21076/2 "2008-10-22T18:52:39Z")
At all of the parts stores, no one has a thermostat with a jiggle valve. ---
**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\ **Post date:** [October 22, 2008, 6:58pm UTC](https://community.cartalk.com/t/thermostat-repair-trouble/21076/3 "2008-10-22T18:58:47Z")
Perhaps there is air in the heater core. You must purge all of the air out of the system after you refill it. Does this car have a valve in the line to the heater core, of just hoses? If there’s a valve, make sure it’s working. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [October 22, 2008, 7:35pm UTC](https://community.cartalk.com/t/thermostat-repair-trouble/21076/4 "2008-10-22T19:35:14Z")
McP’s guess would be my giess also. Many cars have a purge valve in the line to the heater core. You may want to look at yours.