Mercury Repair Questions? Ask a Mechanic for Answers ASAP
I'm sorry the Expert you requested was unavailable to assist you today. It appears that Tech is currently "Offline". Now that his 15 minute "request lock" has expired, hopefully I can be of some assistance in his place. Sorry for the delay.
Are you having a heater problem or an AC problem and or both?Do you have electronic air (buttons) or manual air (knobs)?
Have you installed a set of AC gauges and read the system pressure ?If you place your hands on the both heater hose with the engine warmed up and the heater turned on are both hoses getting nice and hot?
I need you to place you hand on the heater hoses at the firewall where they connect to the heater core and see if both hose are nice and hot.Normal pressure on a full AC system with the compressor running should be right at 35 to 40 PSI on the low side and 200 to 225 PSI on the high side.
Both hose should be to hot to touch and if they are both about the same temp then you have good flow through the core and that usually means the engine is not getting hot enough. When you replaced the thermostat did you install the correct heat range?Are you getting any heat at all out of the vents?
Are you sure you are not dealing with some trapped air in the cooling system. Like I said, both hose should be to hot to hold if you have good flow through them.
That sure sounds like you may have some trapped air which will keep the T stat from operating properly. The best way to check for trapped air is to use a bleed funnel when filling the system.
See the link below, you can pick one up at any auto part store.http://www.amazon.com/Lisle-24680-Spill-Free-Funnel/dp/B00A6AS6LY
If you can get both heater hoses to hot to hold the problem should clear. With everything you have already done I would try using the bleed funnel to make sure there is no trapped air in the system. There really is not much esle it can be if you are sure the new T stat is okay and you have good flow through the heater core.
The question remains open as long as you need me, all you have to do is return to this post, you can bookmark it to make it easier to find me as well. Im here all day most everyday except for Sunday. I am only payed if you rate the service and no you do not have to pay for any follow ups.
Please take a moment to rate my service so I can get credit for my time, the question remains open for follow up even after doing so, all you need to do is return to this question if need be.Thank you again.