Ford F250 Heater Not Working: Likely Causes to Check. Low level of (coolant) antifreeze. Faulty wiring or a blown fuse. Bad coolant hoses or loose clamps. Clogged heater core internal passages. Faulty water pump. Faulty thermostat switch. Defective thermostat. Presence of airlock. 1) From Fiesta's 12pin OEM display plug you connect "SWC1+" or "SMC" cable to "Key1" or "Key2" cable of the 16pin android display main plug. 2) Again From Fiesta's 12pin OEM display plug you bridge "SWC1-" or "SMC Ground" to "GND" (both cables are on the 12pin OEM display plug). 3) Make sure that the GND cable from Fiesta's 12pin OEM display the indicators are not working on the left hand side of the car , front cluster and mirror indicator but the rear one is , but it wasn’t , the hazards don’t flash on that side either , i have checked all fuses and relays, all working, there is not power going to the bulb at the front cluster , i have codes read and cleared that’s when the 175,285. tenspeed answered 10 years ago. Check the electrical connectors that the radio plugs into. It sounds like a circuit is not being energized. When you say "no display" does it mean that there are no numbers or that there is no backlighting to show the numbers. 17 people found this helpful. I've disconnected battery for 20 minutes and re-attached and the radio stopped working for a week until yesterday it came back to life but had the same problems with the various controls only working some of the time. Although unlikely I have checked the fuses and all ok. If you haven't tried yet, disconnect the battery for a couple of minutes then reconnect. This should hard reset the radio and hopefully fix your problem. The stock stereos on that era Fiesta/Focus are wildly known for breaking. Your best bet is to get an aftermarket one. According to Ford Etis my car is " less speed sign recognition", but I can go in to the information system adjust the speed tolerance and tick the speed sign box for the head up display. Grateful for some advice or if any Mk4 Focus has similar problems. Ford fiesta radio not working ford audio message on screen. My 2012 ford fiesta radio just turned off one day while i was driving. it wont turn back on. it is stuck on the "ford audio" screen when tu; 1999 ford fiesta radio stopped working after battery change? 2013 ford fiesta radio in welcome mode. Whats the radio code for a ford fiesta radio 2. The electrical climate control issue. If your fiesta air cooling system is not working then, one possibility can be a problem with the electrical climate control issue. You should reset the climate control issue. To reset, just follow these steps: First, you have to press the off button and floor button at one time. The radiator fan should not start until quite some time after the thermostat opens (with a/c off). Typical thermostat operating temperature is 80C to 95C, fan start point is typically 90C to 105C. Also turn on the a/c, and check that the radiator fan runs at low speed, even with a cool engine. Quote. r4luo09.