View Single Post
  #9 (permalink)  
Old 10 Nov 2017, 03:15 pm
Handy_Cruiser's Avatar
Handy_Cruiser Handy_Cruiser is online now
Obsessed Cruiser
 
Join Date: Oct 2013
Location: Arkansas
Posts: 8,485
Default Re: new thermostat but still no heat from heater any ideas

Quote:
Originally Posted by sanatanadharma View Post
Respectfully, the vacuum canister is the actuator for the fresh air/ recirculation control. Vacuum holds the diverter door in recirculation position. When the car is off or the vacuum fails, a spring resets the fresh air/ recirc-door to fresh air position.

The temperature control (air-blend door) works by a direct cable mechanical connection.

All fresh or recirculated air flows first through the A/C evaporator (which cools and dries only when the A/C compressor is operating).
Then the air blend door (temperature control) diverts some or all of the air (that passed through the A/C evaporator) to flow through the heater core as well.

The engine coolant flows through the heater core whenever the motor is running. There is no water flow control.
Hah!

You are right and I am wrong. And once again, I must defer to the humble wisdom of Sanatanadharma.

I'd been going off a really nice Chilton diagram showing the vacuum solenoid behind the glove box as operating the blend door. Being the knucklehead I am, I had to go confirm Sanatanadharma's guidance on my own PT. And yep, the "mix door" lever (the one we want) is controlled by a cable and is located just left of of the center console on the drivers side. It's a 10-minute job to check it on my 2007 2nd Gen (2006 thru 2010) PT. But I need to assure it's the same on a 1st Gen (2001 thru 2005) PT before I post a corrected how-to.

As always, Sanatanadharma is a very valuable member here and I never take offense when he needs to set me straight. He is the man.

PS: Photos of how to check this on a 2nd Gen PT are attached.
Attached Images
File Type: jpg TempCable1.jpg (50.4 KB, 9 views)
File Type: jpg TempCable2.jpg (75.4 KB, 9 views)
__________________

Last edited by Handy_Cruiser; 10 Nov 2017 at 03:27 pm.
Reply With Quote
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235