Heating has started blowing cold air?

It sounds like you have an air bubble stuck in the heater core which is common. I would get the front of the car in the air (jack) and remove the radiator cap, (engine cold) then start the engine and allow it to get hot while having the heater on full fan speed and heat. This should help the air escape; you can do the same thing while raising the of the car as well. Here is a video that can help as well and a guide:

https://www.youtube.com/watch?v=SNRb6pSwYuU&t

This guide can help you raise the car:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Please upload pictures or videos in your response of any problems so we can see what to help you with.

I'll try that in the morning. I'm just going to run it up on ramps.

Sounds good, let me know how it goes, the heater worked before the work was done correct?

Hi Ken,
Okay, that worked. I have good heat coming out of the floor vent and medium coming from the defrost and vents. It's much better than it was. I don't know why there would be a difference in the temperature between the two. Thanks for your help Ken.

Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.

So having 2 different temperatures like that is normal?

Can you explain a little more what is going on?

Hi Ken, sorry for the delay. I have cancer and I have good days and bad days. Friday night I went for about a 30-mile drive. I had good heat coming from the floor and medium from the vents and defrost. By the time I got home I was getting cooler air coming from the defrost and vents and medium from the floor vent. All the time my temperature gauge stayed at the halfway mark (normal). Checked coolant level the next morning and it was full. Maybe I should change my thermostat back to 185 degrees instead of 192. suggestions?

bad water pump?

I am sorry to hear about your troubles, :/

If the engine is not overheating the water pump is okay, to me it sounds like the heater core needs to be flushed. I would remove the heater hoses and use a garden hose to help flush the core. Check out the images (below). Please let us know what happens.

Hi Ken, thank you. Okay, I'll give that a try and get back to you. Maybe Friday.

Sounds good, have a nice weekend!

You too. I was thinking it could be the heater core itself but theres no fogging inside the car. no leaks inside on the floor. no coolant lost anywhere so... I'll find out !! Later

Yep, it can be just clogged internally which is common.

Merry Xmas Ken! I couldn't get those hose clamps off and it was getting colder because I was doing things outside, so I didn't want my hose to freeze up or break, so I gave up. I'm going to have a shop do it for $60 and be done with it. Thank you. Have a Happy New year and if I ever need your help, I'll be sure to reach out. Later on.

Sounds good, the core flush should fix it, Merry Xmas to you as well, let me know how it goes :)

Hi Ken, Got the heater core flushed. It took them 3 times plus they had to replace my right actuator, so I now have heat! Better than I ever had! Take care Ken. Thanks for your advice. You're on my speed dial. Later on.

You are welcome, please use 2CarPros anytime we are here to help.