Try gently tapping in.
It is best to just replace it.
Its cheap and ez to do
Yes or possibly a stuck thermostat. this is most likely a stuck thermostat. Heater uses water coming through hoses to heat the air. If the thermostat is stuck, the water in the hoses does not get hot. it also explains why you're overheating. be sure to top off coolant after you fix the problem.
You should gas mileage will suffer otherwise
check the thermostat
To fix the aux heat on your thermostat, you can try resetting the thermostat, checking the wiring connections, and ensuring that the auxiliary heat source is functioning properly. If these steps do not resolve the issue, it may be best to contact a professional HVAC technician for further assistance.
change the thermostat
When you turn on the heat and the AC comes on, it may indicate a malfunction in your HVAC system. This issue could be caused by a faulty thermostat, incorrect wiring, or a problem with the control board. It’s essential to check the thermostat settings and ensure it is set to heat mode. If the problem persists, consider consulting a professional technician to diagnose and fix the issue.
In order to fix a stuck thermostat in a 1994 Ford truck, one should take the truck to a certified Ford mechanic to complete the work.
Yes, you can attempt to fix a stuck open thermostat by first checking for any debris or damage that could be causing the issue. If the thermostat is accessible, you can try to clean it gently or tap it lightly to see if it frees up. However, if these methods do not work, it is often more effective to replace the thermostat entirely, as a stuck open thermostat can lead to engine overheating and decreased performance. Always consult a professional mechanic if you're unsure.
The engines thermostat is probably stuck open or has been removed, so change the thermostat and this should fix your problem.
From your description it sounds as if the cooling system thermostat needs to be replaced. Sounds like it may be stuck in the open position which doesn't allow the coolant to warm up sufficiently to supply heat to the radiator.
Possible cause thermostat bad stuck open
Your thermostat is stuck in the open position. Replace the thermostat and no more problems. Quick fix and only costs about 20 dollars.