Heater Cycling On and Off

Isn't there something on the Gen 3's catalytic converter that needs coolant running through it preheat or some kind of nonsense like that and the eBay replacement doesn't have that and those hoses get blocked off joined together something if I'm thinking of the right car anyway that may be where your heat problem lies. I certainly don't have this problem on my generation too It's either ice cold or whatever temperature I set it at in the winter I rarely go over 77 personally with the compressor not running in the winter In the summertime I'm turned down to low cold AC on and air recirculating as cold as it can get and it's ice cold in the car You get out pass out

 

First step in HVAC diagnostics is replacing or removing cabin air filter, which is the most common location you'll find debris... Next step is to monitor engine temperature with an OBD2 reader and phone app. It's also possible the heating element is intermittent. The element is primarily for before engine temp heats up. Also listen to the engine compartment and under the dash for weird/malfunctioning noises as there's valves that manage your coolant flow. And you can check for some HVAC error codes on your console by holding down the info button while turning the headlights on and off 3 times.

 

Show me somebody who can even feel the difference the puny 700 watt supplemental element makes, or tell when it's on or off, and I'll show you someone who could probably also conduct a seance.

(In weather where the windshield is fogged or frosted, it does make a noticeable difference in clearing the windshield. The air coming out still doesn't feel noticeably different, but the windshield clears up faster.)

 

Agreed, and I've never heard of intermittent heat... But you hear something new every day.

 

hopefully not rodent debris.

 

After I turn the car on I back up and get out my driveway and I don't even turn the heat on until I get to the first stop sign It's about a half of a mile now obviously if the windows are completely fogged up I probably wiped them off while I'm getting in the car just because and then I leave the windows cracked while I'm going down to the stop sign so that the cabin stays cool and doesn't I don't fog it up breathing and then by the time I get to the stop sign down there and literally run the heat up to like 80 and put the fan on I'm getting warm air by then even in 32° weather It's not hot but it's warm and then when I turn onto the main road and start driving in the next 3 minutes it'll pretty much be full tilt It won't be staying on that 80 setting very long.